If that nation, against whom I have pronounced, turn from their evil, I will repent of the evil that I thought to do unto them.

If that nation against which I have spoken, shall repent of their evil, I also will repent of the evil that I have thought to do to them.

If that nation against which I have pronounced, shall turn from their evil, I will repent of the evil that I thought to do to them.

And that nation hath turned from its evil, Because I have spoken against it, Then I have repented of the evil that I thought to do to it.

If, in that very minute, that nation of which I was talking is turned away from its evil, my purpose of doing evil to them will be changed.

but if that nation turn from their evil, because of which I have spoken against it, I repent of the evil that I thought to do unto it.

If that nation, against which I have spoken, will repent from their evil, I too will repent from the evil that I have decided I would do to them.

Et conversa fuit gens illa a malo suo (hoc est, a malitia sua,) de qua (vel, pro qua) locutus sum adversus illam; et (potius, tunc; copula valet hic adverbium temporis) poenitebit me super malo, quod cogitaveram ut facerem ei.

I will repent of the evil I will repent of the good - All God's dealings with mankind are here declared to be conditional. God changeth not, all depends upon man's conduct.

If that nation, against which I have pronounced, shall turn from their evil, I will (b) repent of the evil that I thought to do to them.
(b) When the Scripture attributes repentance to God, it is not that he does contrary to that which he has ordained in his secret counsel: but when he threatens it is a calling to repentance, and when he gives man grace to repent, the threatening (which ever contains a condition in it) takes no place: and this the scripture calls repentance in God, because it so appears to man's judgment.

If that nation against whom I have pronounced,.... Such a sentence as this, should immediately, upon the above declaration, do as Nineveh did:
turn from their evil; their evil of sin, their evil ways and works, as an evidence of the truth of their repentance for former sins:
I will repent of the evil that one thought to do unto them; as they change their course of life, God will change the dispensations of his providence towards them, and not bring upon them the evil of punishment he threatened them with; in which sense repentance can only be understood of God, he doing that which is similar to what men do when they repent of anything; they stop their proceedings, and change their outward conduct; so God proceeds not to do what he threatened to do, and changes his outward behaviour to men; he wills a change, and makes one in his methods of acting, but never changes his will.

their evil--in antithesis to, "the evil that I thought to do."
repent--God herein adapts Himself to human conceptions. The change is not in God, but in the circumstances which regulate God's dealings: just as we say the land recedes from us when we sail forth, whereas it is we who recede from the land (Ezekiel 18:21; Ezekiel 33:11). God's unchangeable principle is to do the best that can be done under all circumstances; if then He did not take into account the moral change in His people (their prayers, &c.), He would not be acting according to His own unchanging principle (Jeremiah 18:9-10). This is applied practically to the Jews' case (Jeremiah 18:11; see Jeremiah 26:3; Jonah 3:10).