After Jesus’ resurrection, He appeared to his disciples (John 20:21-23 NET):

So Jesus said to them again, “Peace be with you.  Just as the Father has sent me, I also send you.”  And after he said this, he breathed on them and said, “Receive the Holy Spirit.  If you forgive (ἀφῆτε, a form of ἀφίημι) anyone’s sins (ἁμαρτίας, a form of ἁμαρτία), they are forgiven (ἀφέωνται, another form of ἀφίημι); if you retain (κρατῆτε, a form of κρατέω) anyone’s sins, they are retained (κεκράτηνται, another form of κρατέω).”

In John 20:23 (NET) Jesus contrasted forgiving (ἀφίημι) sins to retaining (κρατέω) them.  The contrast in Matthew 4:11 (NET) is that the devil left (ἀφίησιν, another form of ἀφίημι) [Jesus], and angels came (προσῆλθον, a form of προσέρχομαι) and began ministering to his needs.  In Matthew 4:20 (NET) Simon (called Peter) and Andrew left (ἀφέντες, another form of ἀφίημι) their nets immediately and followed (ἠκολούθησαν, a form of ἀκολουθέω) [Jesus].  In Matthew 9:25 (NET) krateō, (κρατέω) is contrasted to ekballō (ἐκβάλλω):  But when the crowd had been put outside (ἐξεβλήθη, a form of ἐκβάλλω), he went in and gently took (ἐκράτησεν, another form of κρατέω) her by the hand, and the girl got up.

I get the point that to forgive another’s sins, I send those sins away from that person, creating a distance, rather than holding them close.  This is something I do in my mind, not recalling a sin as I recall the forgiven person.  But John 20:21-23 seems to indicate that the consequence of doing (or not doing) so is farther-reaching than my mind.

Jesus taught his followers to pray (Matthew 6:12 NET), forgive (ἄφες, another form of ἀφίημι) us our debts, as we ourselves have forgiven¹ (ἀφήκαμεν, another form of ἀφίημι) our debtors.  How easily such prayer could become a self-invoked curse (Matthew 6:14, 15 NET): For if you forgive (ἀφῆτε, a form of ἀφίημι) others their sins (παραπτώματα, a form of παράπτωμα), your heavenly Father will also forgive (ἀφήσει, another form of ἀφίημι) you.  But if you do not forgive (ἀφῆτε, a form of ἀφίημι) others,² your Father will not forgive (ἀφήσει, another form of ἀφίημι) you your sins (παραπτώματα, a form of παράπτωμα).

Jesus’ teaching recorded in Matthew 18:15-20 (NET) offers a counter example to 1 John 1:9 and 10, and aligns with his teaching recorded in John 20:21-23:

If your brother sins (ἁμαρτήσῃ, a form of ἁμαρτάνω),³ go and⁴ show him his fault (ἔλεγξον, a form of ἐλέγχω) when the two of you are alone.  If he listens (ἀκούσῃ, a form of ἀκούω) to you, you have regained (ἐκέρδησας, a form of κερδαίνω) your brother.  But if he does not listen (ἀκούσῃ, a form of ἀκούω), take one or two others with you, so that at the testimony of two or three witnesses every matter may be established.  If he refuses to listen (παρακούσῃ, a form of παρακούω) to them, tell it to the church (ἐκκλησίᾳ).  If he refuses to listen (παρακούσῃ, a form of παρακούω) to the church (ἐκκλησίας, a form of ἐκκλησία), treat him like a Gentile or a tax collector.  I tell you the truth, whatever you bind (δήσητε, a form of δέω) on earth will have been bound (δεδεμένα, another form of δέω) in heaven,⁵ and whatever you release (λύσητε, a form of λύω) on earth will have been released (λελυμένα, another form of λύω) in heaven.  Again, I tell you the truth⁶, if two of⁷ you on earth agree about whatever you ask, my Father in heaven will do it for you.  For where two or three are assembled in my name, I am there among them.

This passage begins with instruction how to handle a person who will not confess (ὁμολογῶμεν, a form of ὁμολογέω) sin (1 John 1:9, 10 NET).

But if we confess (ὁμολογῶμεν, a form of ὁμολογέω) our sins (ἁμαρτίας, a form of ἁμαρτία), he is faithful (πιστός) and righteous (δίκαιος), forgiving (ἀφῇ, another form of  ἀφίημι) us our sins (ἁμαρτίας, a form of ἁμαρτία) and cleansing (καθαρίσῃ, a form of καθαρίζω) us from all unrighteousness (ἀδικίας, a form of ἀδικία).  If we say we have not sinned (ἡμαρτήκαμεν, another form of ἁμαρτάνω), we make (ποιοῦμεν, a form of ποιέω) him a liar and his word (λόγος) is not in us.

To confess (ὁμολογῶμεν, a form of ὁμολογέω) sin is to acknowledge the word (λόγος) of Jesus concerning sin, to agree with Him that the thing in question is sin.  The purpose is not to humiliate the sinner but to regain (ἐκέρδησας, a form κερδαίνω) a brother (as opposed to winning an argument).  That purpose remains throughout, up to and including shunning.  Forgiveness is not given out of the fear of Matthew 6:14 and 15, but on the basis of God’s own forgiveness through Jesus Christ.  It is also important that the λόγος of Jesus is truly the basis for determining sin as opposed to some distinctive of a religious sect.

The binding and releasing of Matthew 18:18 seem to correspond to forgiving and retaining sins in John 20:23.  There is apparently an ongoing debate whether the binding and releasing will have been or will be bound or released in heaven.  The point seems moot.  In either case the agreement of two on earth as to what is to be bound or released, forgiven or retained, carries the imprimatur of heaven.  It’s a sobering thought.  But the scale tips toward releasing and forgiving because of the character of God.

The passage continues (Matthew 18:21, 22 NET):

Then Peter came to him and said, “Lord, how many times must I forgive (ἀφήσω, another form of ἀφίημι) my brother who sins against me?  As many as seven times?”  Jesus said to him, “Not seven times, I tell you, but seventy-seven times!”

Then Jesus told a parable that might shed some light on how literal one should be about seventy-seven times (Matthew 18:23-35 NET).

“For this reason, the kingdom of heaven is like a king who wanted to settle accounts with his slaves.  As he began settling his accounts, a man who owed ten thousand talents was brought to him.  Because he was not able to repay it, the⁸ lord ordered him to be sold, along with his wife, children, and whatever he possessed,⁹ and repayment to be made.  Then the slave threw himself to the ground before him, saying,¹⁰ ‘Be patient with me, and I will repay you everything.’  The lord had compassion on that slave and released (ἀπέλυσεν, a form of ἀπολύω) him, and forgave (ἀφῆκεν, another form of ἀφίημι) him the debt.  After he went out, that same slave found one of his fellow slaves who owed him one hundred silver coins.  So he grabbed him by the throat and started to choke him, saying, ‘Pay back¹¹ what¹² you owe me!’  Then his fellow slave threw himself down¹³ and begged (παρεκάλει, a form of παρακαλέω) him, ‘Be patient with me, and I will repay¹⁴ you.’  But he refused.  Instead, he went out and threw him in prison until¹⁵ he repaid the debt.  When¹⁶ his fellow slaves saw what had happened, they were very upset and went and told their¹⁷ lord everything that had taken place.  Then his lord called the first slave and said to him, ‘Evil slave!  I forgave (ἀφῆκα, another form of ἀφίημι) you all that debt because you begged (παρεκάλεσας, another form of παρακαλέω) me!  Should you not have shown mercy (ἐλεῆσαι, a form of ἐλεέω) to your fellow slave, just as I¹⁸ showed (ἠλέησα, another form of ἐλεέω) it to you?’  And in anger his lord turned him over to the prison guards to torture him until he repaid all he owed.¹⁹  So also my heavenly Father will do to you, if each of you does not forgive (ἀφῆτε, a form of ἀφίημι) your brother from your heart.”²⁰

Have faith (πίστιν, a form of πίστις) in God, Jesus told his disciples.²¹  For this reason I tell you, whatever²² you pray²³ and²⁴ ask for,²⁵ believe (πιστεύετε, a form of πιστεύω) that you have received²⁶ it, and it will be yours.²⁷  The topic here is not forgiveness but faith in God and believing what one asks for in prayer.  Yet the connection between faith in God and forgiveness is so strong in Jesus’ mind that I find his thumb on the scale again (Mark 11:25 NET):

Whenever you stand²⁸ praying, if you have anything against anyone, forgive (ἀφίετε, another form of ἀφίημι) him, so that your Father in heaven will also forgive (ἀφῇ, another form of ἀφίημι) you your sins (παραπτώματα, a form of παράπτωμα).

Watch yourselves! Jesus said.  If²⁹ your brother sins (ἁμάρτῃ, another form of ἁμαρτάνω),³⁰ rebuke (ἐπιτίμησον, a form of ἐπιτιμάω) him. If he repents (μετανοήσῃ, a form of μετανοέω), forgive (ἄφες, another form of ἀφίημι) him.  Even if he sins (ἁμαρτήσῃ, another form of ἁμαρτάνω)³¹ against you seven times in a day, and seven times³² returns to³³ you saying, “I repent (μετανοῶ, another form of μετανοέω),” you must forgive (ἀφήσεις, another form of ἀφίημι) him.³⁴  It is worth noting that the sinner’s repentance did not mean that the sinner’s sin had ceased.  On the contrary, Jesus’ thumb is most heavy on the scale, tipping it toward release and forgiveness, when sin against God was arguably at its zenith (Luke 23:33 NET):

So when they came³⁵ to the place that is called “The Skull,” they crucified [Jesus] there, along with the criminals, one on his right and one on his left.

It was then and there that Jesus interceded for all humanity (Luke 23:34a NET):

Father, forgive them (αφες αυτοις), for they don’t know (οἴδασιν, a form of εἴδω) what they are doing (ποιοῦσιν, another form of ποιέω).

He didn’t follow the rule of ἀφίημι He inspired in 1 John 1:9 and 10 or articulated in Luke 17:3 and 4.  Jesus didn’t wait for humanity to confess (ὁμολογέω) sin or repent (μετανοέω) but prayed that God his Father would forgive anyway.  It is safe to assume that Jesus has faith in God, that He believes what He prayed and that He expects to receive what He prayed.

Or, perhaps, αφες (a form of ἀφίημι) should have been translated leave rather than forgive in Luke 23:34 (NET) as it was in Matthew 15:14 (NET):

Leave them (αφετε αυτους)!  They are blind guides.³⁶ If someone who is blind leads another who is blind, both will fall into a pit.

 

Addendum: October 6, 2018
Tables of Matthew 6:12; 6:15; 18:15; 18:18, 19; 18:25, 26; 18:28-31; 18:33-35; Mark 11:22; 11:24, 25; Luke 17:3, 4; 23:33, 34 and Matthew 15:14 comparing the NET and KJV follow.

Matthew 6:12 (NET)	Matthew 6:12 (KJV)
and forgive us our debts, as we ourselves have forgiven our debtors.	And forgive us our debts, as we forgive our debtors.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
καὶ ἄφες ἡμῖν τὰ ὀφειλήματα ἡμῶν, ὡς καὶ ἡμεῖς ἀφήκαμεν τοῖς ὀφειλέταις ἡμῶν	και αφες ημιν τα οφειληματα ημων ως και ημεις αφιεμεν τοις οφειλεταις ημων	και αφες ημιν τα οφειληματα ημων ως και ημεις αφιεμεν τοις οφειλεταις ημων

Matthew 6:15 (NET)	Matthew 6:15 (KJV)
But if you do not forgive others, your Father will not forgive you your sins.	But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
ἐὰν δὲ μὴ ἀφῆτε τοῖς ἀνθρώποις , οὐδὲ ὁ πατὴρ ὑμῶν ἀφήσει τὰ παραπτώματα ὑμῶν	εαν δε μη αφητε τοις ανθρωποις τα παραπτωματα αυτων ουδε ο πατηρ υμων αφησει τα παραπτωματα υμων	εαν δε μη αφητε τοις ανθρωποις τα παραπτωματα αυτων ουδε ο πατηρ υμων αφησει τα παραπτωματα υμων

Matthew 18:15 (NET)	Matthew 18:15 (KJV)
If your brother sins, go and show him his fault when the two of you are alone.  If he listens to you, you have regained your brother.	Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
Ἐὰν δὲ ἁμαρτήσῃ  ὁ ἀδελφός σου, ὕπαγε ἔλεγξον αὐτὸν μεταξὺ σοῦ καὶ αὐτοῦ μόνου. ἐάν σου ἀκούσῃ, ἐκέρδησας τὸν ἀδελφόν σου	εαν δε αμαρτηση εις σε ο αδελφος σου υπαγε και ελεγξον αυτον μεταξυ σου και αυτου μονου εαν σου ακουση εκερδησας τον αδελφον σου	εαν δε αμαρτηση εις σε ο αδελφος σου υπαγε και ελεγξον αυτον μεταξυ σου και αυτου μονου εαν σου ακουση εκερδησας τον αδελφον σου

Matthew 18:18, 19 (NET)	Matthew 18:18, 19 (KJV)
I tell you the truth, whatever you bind on earth will have been bound in heaven, and whatever you release on earth will have been released in heaven.	Verily I say unto you, Whatsoever ye shall bind on earth shall be bound in heaven: and whatsoever ye shall loose on earth shall be loosed in heaven.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
Ἀμὴν λέγω ὑμῖν· ὅσα ἐὰν δήσητε ἐπὶ τῆς γῆς ἔσται δεδεμένα ἐν οὐρανῷ, καὶ ὅσα ἐὰν λύσητε ἐπὶ τῆς γῆς ἔσται λελυμένα ἐν οὐρανῷ	αμην λεγω υμιν οσα εαν δησητε επι της γης εσται δεδεμενα εν τω ουρανω και οσα εαν λυσητε επι της γης εσται λελυμενα εν τω ουρανω	αμην λεγω υμιν οσα εαν δησητε επι της γης εσται δεδεμενα εν τω ουρανω και οσα εαν λυσητε επι της γης εσται λελυμενα εν τω ουρανω

Again, I tell you the truth, if two of you on earth agree about whatever you ask, my Father in heaven will do it for you.

Again I say unto you, That if two of you shall agree on earth as touching any thing that they shall ask, it shall be done for them of my Father which is in heaven.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
Πάλιν [ἀμὴν] λέγω ὑμῖν ὅτι ἐὰν δύο συμφωνήσωσιν ἐξ ὑμῶν ἐπὶ τῆς γῆς περὶ παντὸς πράγματος οὗ ἐὰν αἰτήσωνται, γενήσεται αὐτοῖς παρὰ τοῦ πατρός μου τοῦ ἐν οὐρανοῖς	παλιν λεγω υμιν οτι εαν δυο υμων συμφωνησωσιν επι της γης περι παντος πραγματος ου εαν αιτησωνται γενησεται αυτοις παρα του πατρος μου του εν ουρανοις	παλιν αμην λεγω υμιν οτι εαν δυο υμων συμφωνησωσιν επι της γης περι παντος πραγματος ου εαν αιτησωνται γενησεται αυτοις παρα του πατρος μου του εν ουρανοις

Matthew 18:25, 26 (NET)	Matthew 18:25, 26 (KJV)
Because he was not able to repay it, the lord ordered him to be sold, along with his wife, children, and whatever he possessed, and repayment to be made.	But forasmuch as he had not to pay, his lord commanded him to be sold, and his wife, and children, and all that he had, and payment to be made.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
μὴ ἔχοντος δὲ αὐτοῦ ἀποδοῦναι ἐκέλευσεν αὐτὸν ὁ κύριος πραθῆναι καὶ τὴν γυναῖκα καὶ τὰ τέκνα καὶ πάντα ὅσα ἔχει, καὶ ἀποδοθῆναι	μη εχοντος δε αυτου αποδουναι εκελευσεν αυτον ο κυριος αυτου πραθηναι και την γυναικα αυτου και τα τεκνα και παντα οσα ειχεν και αποδοθηναι	μη εχοντος δε αυτου αποδουναι εκελευσεν αυτον ο κυριος αυτου πραθηναι και την γυναικα αυτου και τα τεκνα και παντα οσα ειχεν και αποδοθηναι

Then the slave threw himself to the ground before him, saying, ‘Be patient with me, and I will repay you everything.’

The servant therefore fell down, and worshipped him, saying, Lord, have patience with me, and I will pay thee all.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
πεσὼν οὖν ὁ δοῦλος προσεκύνει αὐτῷ λέγων· μακροθύμησον ἐπ᾿ ἐμοί, καὶ πάντα ἀποδώσω σοι	πεσων ουν ο δουλος προσεκυνει αυτω λεγων κυριε μακροθυμησον επ εμοι και παντα σοι αποδωσω	πεσων ουν ο δουλος προσεκυνει αυτω λεγων κυριε μακροθυμησον επ εμοι και παντα σοι αποδωσω

Matthew 18:28-31 (NET)	Matthew 18:28-31 (KJV)
After he went out, that same slave found one of his fellow slaves who owed him one hundred silver coins.  So he grabbed him by the throat and started to choke him, saying, ‘Pay back what you owe me!’	But the same servant went out, and found one of his fellowservants, which owed him an hundred pence: and he laid hands on him, and took him by the throat, saying, Pay me that thou owest.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
ἐξελθὼν δὲ ὁ δοῦλος ἐκεῖνος εὗρεν ἕνα τῶν συνδούλων αὐτοῦ, ὃς ὤφειλεν αὐτῷ ἑκατὸν δηνάρια, καὶ κρατήσας αὐτὸν ἔπνιγεν λέγων· ἀπόδος εἴ τι ὀφείλεις	εξελθων δε ο δουλος εκεινος ευρεν ενα των συνδουλων αυτου ος ωφειλεν αυτω εκατον δηναρια και κρατησας αυτον επνιγεν λεγων αποδος μοι ο τι οφειλεις	εξελθων δε ο δουλος εκεινος ευρεν ενα των συνδουλων αυτου ος ωφειλεν αυτω εκατον δηναρια και κρατησας αυτον επνιγεν λεγων αποδος μοι ει τι οφειλεις

Then his fellow slave threw himself down and begged him, ‘Be patient with me, and I will repay you.’

And his fellowservant fell down at his feet, and besought him, saying, Have patience with me, and I will pay thee all.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
πεσὼν οὖν ὁ σύνδουλος αὐτοῦ παρεκάλει αὐτὸν λέγων· μακροθύμησον ἐπ᾿ ἐμοί, καὶ ἀποδώσω σοι	πεσων ουν ο συνδουλος αυτου εις τους ποδας αυτου παρεκαλει αυτον λεγων μακροθυμησον επ εμοι και παντα αποδωσω σοι	πεσων ουν ο συνδουλος αυτου εις τους ποδας αυτου παρεκαλει αυτον λεγων μακροθυμησον επ εμοι και αποδωσω σοι

But he refused.  Instead, he went out and threw him in prison until he repaid the debt.

And he would not: but went and cast him into prison, till he should pay the debt.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
ὁ δὲ οὐκ ἤθελεν ἀλλὰ ἀπελθὼν ἔβαλεν αὐτὸν εἰς φυλακὴν ἕως ἀποδῷ τὸ ὀφειλόμενον	ο δε ουκ ηθελεν αλλα απελθων εβαλεν αυτον εις φυλακην εως ου αποδω το οφειλομενον	ο δε ουκ ηθελεν αλλα απελθων εβαλεν αυτον εις φυλακην εως ου αποδω το οφειλομενον

When his fellow slaves saw what had happened, they were very upset and went and told their lord everything that had taken place.

So when his fellowservants saw what was done, they were very sorry, and came and told unto their lord all that was done.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
ἰδόντες οὖν οἱ σύνδουλοι αὐτοῦ τὰ γενόμενα ἐλυπήθησαν σφόδρα καὶ ἐλθόντες διεσάφησαν τῷ κυρίῳ ἑαυτῶν πάντα τὰ γενόμενα	ιδοντες δε οι συνδουλοι αυτου τα γενομενα ελυπηθησαν σφοδρα και ελθοντες διεσαφησαν τω κυριω αυτων παντα τα γενομενα	ιδοντες δε οι συνδουλοι αυτου τα γενομενα ελυπηθησαν σφοδρα και ελθοντες διεσαφησαν τω κυριω εαυτων παντα τα γενομενα

Matthew 18:33-35 (NET)	Matthew 18:33-35 (KJV)
Should you not have shown mercy to your fellow slave, just as I showed it to you?’	Shouldest not thou also have had compassion on thy fellowservant, even as I had pity on thee?

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
οὐκ ἔδει καὶ σὲ ἐλεῆσαι τὸν σύνδουλον σου, ὡς καγὼ σὲ ἠλέησα	ουκ εδει και σε ελεησαι τον συνδουλον σου ως και εγω σε ηλεησα	ουκ εδει και σε ελεησαι τον συνδουλον σου ως και εγω σε ηλεησα

And in anger his lord turned him over to the prison guards to torture him until he repaid all he owed.

And his lord was wroth, and delivered him to the tormentors, till he should pay all that was due unto him.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
καὶ ὀργισθεὶς ὁ κύριος αὐτοῦ παρέδωκεν αὐτὸν τοῖς βασανισταῖς ἕως |οὗ| ἀποδῷ πᾶν τὸ ὀφειλόμενον	και οργισθεις ο κυριος αυτου παρεδωκεν αυτον τοις βασανισταις εως ου αποδω παν το οφειλομενον αυτω	και οργισθεις ο κυριος αυτου παρεδωκεν αυτον τοις βασανισταις εως ου αποδω παν το οφειλομενον αυτω

So also my heavenly Father will do to you, if each of you does not forgive your brother from your heart.

So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
οὕτως καὶ ὁ πατήρ μου ὁ οὐράνιος ποιήσει ὑμῖν, ἐὰν μὴ ἀφῆτε ἕκαστος τῷ ἀδελφῷ αὐτοῦ ἀπὸ τῶν καρδιῶν ὑμῶν	ουτως και ο πατηρ μου ο επουρανιος ποιησει υμιν εαν μη αφητε εκαστος τω αδελφω αυτου απο των καρδιων υμων τα παραπτωματα αυτων	ουτως και ο πατηρ μου ο επουρανιος ποιησει υμιν εαν μη αφητε εκαστος τω αδελφω αυτου απο των καρδιων υμων τα παραπτωματα αυτων

Mark 11:22 (NET)	Mark 11:22 (KJV)
Jesus said to them, “Have faith in God.	And Jesus answering saith unto them, Have faith in God.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
καὶ ἀποκριθεὶς ὁ Ἰησοῦς λέγει αὐτοῖς· ἔχετε πίστιν θεοῦ	και αποκριθεις ιησους λεγει αυτοις εχετε πιστιν θεου	και αποκριθεις ο ιησους λεγει αυτοις εχετε πιστιν θεου

Mark 11:24, 25 (NET)	Mark 11:24, 25 (KJV)
For this reason I tell you, whatever you pray and ask for, believe that you have received it, and it will be yours.	Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
διὰ τοῦτο λέγω ὑμῖν, πάντα ὅσα προσεύχεσθε καὶ αἰτεῖσθε, πιστεύετε ὅτι ἐλάβετε, καὶ ἔσται ὑμῖν	δια τουτο λεγω υμιν παντα οσα αν προσευχομενοι αιτεισθε πιστευετε οτι λαμβανετε και εσται υμιν	δια τουτο λεγω υμιν παντα οσα αν προσευχομενοι αιτησθε πιστευετε οτι λαμβανετε και εσται υμιν

Whenever you stand praying, if you have anything against anyone, forgive him, so that your Father in heaven will also forgive you your sins.”

And when ye stand praying, forgive, if ye have ought against any: that your Father also which is in heaven may forgive you your trespasses.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
Καὶ ὅταν στήκετε προσευχόμενοι, ἀφίετε εἴ τι ἔχετε κατά τινος, ἵνα καὶ ὁ πατὴρ ὑμῶν ὁ ἐν τοῖς οὐρανοῖς ἀφῇ ὑμῖν τὰ παραπτώματα ὑμῶν	και οταν στηκητε προσευχομενοι αφιετε ει τι εχετε κατα τινος ινα και ο πατηρ υμων ο εν τοις ουρανοις αφη υμιν τα παραπτωματα υμων	και οταν στηκητε προσευχομενοι αφιετε ει τι εχετε κατα τινος ινα και ο πατηρ υμων ο εν τοις ουρανοις αφη υμιν τα παραπτωματα υμων

Luke 17:3, 4 (NET)	Luke 17:3, 4 (KJV)
Watch yourselves!  If your brother sins, rebuke him.  If he repents, forgive him.	Take heed to yourselves: If thy brother trespass against thee, rebuke him; and if he repent, forgive him.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
προσέχετε ἑαυτοῖς. Ἐὰν ἁμάρτῃ ὁ ἀδελφός σου ἐπιτίμησον αὐτῷ, καὶ ἐὰν μετανοήσῃ ἄφες αὐτῷ	προσεχετε εαυτοις εαν δε αμαρτη εις σε ο αδελφος σου επιτιμησον αυτω και εαν μετανοηση αφες αυτω	προσεχετε εαυτοις εαν δε αμαρτη εις σε ο αδελφος σου επιτιμησον αυτω και εαν μετανοηση αφες αυτω

Even if he sins against you seven times in a day, and seven times returns to you saying, ‘I repent,’ you must forgive him.”

And if he trespass against thee seven times in a day, and seven times in a day turn again to thee, saying, I repent; thou shalt forgive him.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
καὶ ἐὰν ἑπτάκις τῆς ἡμέρας ἁμαρτήσῃ εἰς σὲ καὶ ἑπτάκις ἐπιστρέψῃ πρὸς σὲ λέγων· μετανοῶ, ἀφήσεις αὐτῷ	και εαν επτακις της ημερας αμαρτη εις σε και επτακις της ημερας επιστρεψη επι σε λεγων μετανοω αφησεις αυτω	και εαν επτακις της ημερας αμαρτη εις σε και επτακις της ημερας επιστρεψη λεγων μετανοω αφησεις αυτω

Luke 23:33, 34 (NET)	Luke 23:33, 34 (KJV)
So when they came to the place that is called “The Skull,” they crucified him there, along with the criminals, one on his right and one on his left.	And when they were come to the place, which is called Calvary, there they crucified him, and the malefactors, one on the right hand, and the other on the left.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
Καὶ ὅτε ἦλθον ἐπὶ τὸν τόπον τὸν καλούμενον Κρανίον, ἐκεῖ ἐσταύρωσαν αὐτὸν καὶ τοὺς κακούργους, ὃν μὲν ἐκ δεξιῶν ὃν δὲ ἐξ ἀριστερῶν	και οτε απηλθον επι τον τοπον τον καλουμενον κρανιον εκει εσταυρωσαν αυτον και τους κακουργους ον μεν εκ δεξιων ον δε εξ αριστερων	και οτε απηλθον επι τον τοπον τον καλουμενον κρανιον εκει εσταυρωσαν αυτον και τους κακουργους ον μεν εκ δεξιων ον δε εξ αριστερων

[But Jesus said, “Father, forgive them, for they don’t know what they are doing.”]  Then they threw dice to divide his clothes.

Then said Jesus, Father, forgive them; for they know not what they do.  And they parted his raiment, and cast lots.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
[[ὁ δε Ἰησοῦς ἔλεγεν· πάτερ, ἄφες αὐτοῖς, οὐ γὰρ οἴδασιν τί ποιοῦσιν.]] διαμεριζόμενοι δὲ τὰ ἱμάτια αὐτοῦ ἔβαλον |κλήρους|	ο δε ιησους ελεγεν πατερ αφες αυτοις ου γαρ οιδασιν τι ποιουσιν διαμεριζομενοι δε τα ιματια αυτου εβαλον κληρον	ο δε ιησους ελεγεν πατερ αφες αυτοις ου γαρ οιδασιν τι ποιουσιν διαμεριζομενοι δε τα ιματια αυτου εβαλον κληρον

Matthew 15:14 (NET)	Matthew 15:14 (KJV)
Leave them!  They are blind guides.  If someone who is blind leads another who is blind, both will fall into a pit.	Let them alone: they be blind leaders of the blind.  And if the blind lead the blind, both shall fall into the ditch.

NET Parallel Greek	Stephanus Textus Receptus	Byzantine Majority Text
ἄφετε αὐτούς· τυφλοί εἰσιν ὁδηγοί· τυφλὸς δὲ τυφλὸν ἐὰν ὁδηγῇ, ἀμφότεροι εἰς βόθυνον πεσοῦνται	αφετε αυτους οδηγοι εισιν τυφλοι τυφλων τυφλος δε τυφλον εαν οδηγη αμφοτεροι εις βοθυνον πεσουνται	αφετε αυτους οδηγοι εισιν τυφλοι τυφλων τυφλος δε τυφλον εαν οδηγη αμφοτεροι εις βοθυνον πεσουνται

 

Addendum: May 22, 2020
A table comparing Jesus’ quotation of Deuteronomy from the Septuagint follows.

Matthew 18:16b (NET Parallel Greek)	Deuteronomy 19:15 (Septuagint BLB)	Deuteronomy 19:15 (Septuagint Elpenor)
ἐπὶ στόματος δύο μαρτύρων ἢ τριῶν σταθῇ πᾶν ρῆμα	ἐπὶ στόματος δύο μαρτύρων καὶ ἐπὶ στόματος τριῶν μαρτύρων σταθήσεται πᾶν ῥῆμα	ἐπὶ στόματος δύο μαρτύρων καὶ ἐπὶ στόματος τριῶν μαρτύρων στήσεται πᾶν ρῆμα
Matthew 18:16b (NET)	Deuteronomy 19:15 (NETS)	Deuteronomy 19:15 (English Elpenor)
at the testimony of two or three witnesses every matter may be established	By the mouth of two or three witnesses shall any word be sustained.	by the mouth of two witnesses, or by the mouth of three witnesses, shall every word be established

Tables comparing Deuteronomy 19:15 in the Tanakh, KJV and NET, and Deuteronomy 19:15 in the Septuagint (BLB and Elpenor) follow.

Deuteronomy 19:15 (Tanakh)	Deuteronomy 19:15 (KJV)	Deuteronomy 19:15 (NET)
One witness shall not rise up against a man for any iniquity, or for any sin, in any sin that he sinneth; at the mouth of two witnesses, or at the mouth of three witnesses, shall a matter be establishment	One witness shall not rise up against a man for any iniquity, or for any sin, in any sin that he sinneth: at the mouth of two witnesses, or at the mouth of three witnesses, shall the matter be established.	A single witness may not testify against another person for any trespass or sin that he commits.  A matter may be legally established only on the testimony of two or three witnesses.

Deuteronomy 19:15 (Septuagint BLB)	Deuteronomy 19:15 (Septuagint Elpenor)
οὐκ ἐμμενεῗ μάρτυς εἷς μαρτυρῆσαι κατὰ ἀνθρώπου κατὰ πᾶσαν ἀδικίαν καὶ κατὰ πᾶν ἁμάρτημα καὶ κατὰ πᾶσαν ἁμαρτίαν ἣν ἂν ἁμάρτῃ ἐπὶ στόματος δύο μαρτύρων καὶ ἐπὶ στόματος τριῶν μαρτύρων σταθήσεται πᾶν ῥῆμα	Οὐκ ἐμμενεῖ μάρτυς εἷς μαρτυρῆσαι κατὰ ἀνθρώπου κατὰ πᾶσαν ἀδικίαν καὶ κατὰ πᾶν ἁμάρτημα καὶ κατὰ πᾶσαν ἁμαρτίαν, ἣν ἐὰν ἁμάρτῃ· ἐπὶ στόματος δύο μαρτύρων καὶ ἐπὶ στόματος τριῶν μαρτύρων στήσεται πᾶν ρῆμα
Deuteronomy 19:15 (NETS)	Deuteronomy 19:15 (English Elpenor)
One witness shall not suffice against a person in any injustice and in any wrongdoing and in any sin that he may sin.  By the mouth of two or three witnesses shall any word be sustained.	One witness shall not stand to testify against a man for any iniquity, or for any fault, or for any sin which he may commit; by the mouth of two witnesses, or by the mouth of three witnesses, shall every word be established.