| Barnes' Notes on the Bible A protest against vindictiveness in every form. Compare marginal reference.
Gill's Exposition of the Entire BibleSay not, I will do so to him as he hath done to me,.... He has falsely accused and reproached me, and bore a false testimony, or suborned false witnesses against me, and I will do the same to him, now an opportunity serves; but as private revenge itself is sinful, so especially when it is pursued in a wicked way; I will render to the man according to his work; this should be left to the Lord, whose prerogative it is; see Proverbs 24:19.
Keil and Delitzsch Biblical Commentary on the Old TestamentThe following proverb is connected as to its subject with the foregoing: one ought not to do evil to his neighbour without necessity; even evil which has been done to one must not be requited with evil: Say not, "As he hath done to me, so I do to him: I requite the man according to his conduct." On the ground of public justice, the talio is certainly the nearest form of punishment, Leviticus 24:19.; but even here the Sinaitic law does not remain in the retortion of the injury according to its external form (it is in a certain manner practicable only with regard to injury done to the person and to property), but places in its stead an atonement measured and limited after a higher point of view. On pure moral grounds, the jus talionis ("as thou to me, so I to thee") has certainly no validity. Here he to whom injustice is done ought to commit his case to God, Proverbs 20:22, and to oppose to evil, not evil but good; he ought not to set himself up as a judge, nor to act as one standing on a war-footing with his neighbour (Judges 15:11); but to take God as his example, who treats the sinner, if only he seeks it, not in the way of justice, but of grace (Exodus 34:6.). The expression 29b reminds of Proverbs 24:12. Instead of לאדם, there is used here, where the speaker points to a definite person, the phrase לאישׁ. Jerome, the Venet., and Luther translate: to each one, as if the word were vocalized thus, לאישׁ (Psalm 62:13).
Geneva Study BibleSay not, I will do so to him as he hath done to me: I {i} will render to the man according to his work. (i) He shows what is the nature of the wicked, to revenge wrong for wrong.
Jamieson-Fausset-Brown Bible Commentary29. Especially avoid retaliation (Mt 5:43-45; Ro 12:17).
Matthew Henry's Concise Commentary24:28,29. There are three defaults in a witness pointed out.
Matthew Henry's Whole Bible CommentaryVerses 28-29 We are here forbidden to be in any thing injurious to our neighbour, particularly in and by the forms of law, either, 1. As a witness: "Never bear a testimony against any man without cause, unless what thou sayest thou knowest to be punctually true and thou hast a clear call to testify it. Never bear a false testimony against any one;" for it follows, "Deceive not with thy lips; deceive not the judge and jury, deceive not those whom thou conversest with, into an ill opinion of thy neighbour. When thou speakest of thy neighbour do not only speak that which is true, but take heed lest, in the manner of thy speaking, thou insinuate any thing that is otherwise and so shouldst deceive by innuendos or hyperboles." Or, 2. As a plaintiff or prosecutor. If there be occasion to bring an action or information against thy neighbour, let it not be from a spirit of revenge. "Say not, I am resolved I will be even with him: I will do so to him as he had done to me." Even a righteous cause becomes unrighteous when it is thus prosecuted with malice. Say not, I will render to the man according to his work, and make him pay dearly for it; for it is God's prerogative to do so, and we must leave it to him, and not step into his throne, or take his work out of his hands. If we will needs be our own carvers, and judges in our own cause, we forfeit the benefit of an appeal to God's tribunal; therefore we must not avenge ourselves, because he has said, Vengeance is mine. | 
