Cross reference
Jonah 3:4
4 Jonah began to enter into the city a day's journey, and he cried out, and said, "Yet forty days, and Nineveh shall be overthrown!"
Deuteronomy 18:22
22 when a prophet speaks in the name of Yahweh, if the thing doesn't follow, nor happen, that is the thing which Yahweh has not spoken: the prophet has spoken it presumptuously, you shall not be afraid of him.
Jeremiah 18:7-10
7 At what instant I shall speak concerning a nation, and concerning a kingdom, to pluck up and to break down and to destroy it;
8 if that nation, concerning which I have spoken, turn from their evil, I will repent of the evil that I thought to do to them.
9 At what instant I shall speak concerning a nation, and concerning a kingdom, to build and to plant it;
10 if they do that which is evil in my sight, that they not obey my voice, then I will repent of the good, with which I said I would benefit them.
2 Kings 20:1
1 In those days was Hezekiah sick to death. Isaiah the prophet the son of Amoz came to him, and said to him, Thus says Yahweh, Set your house in order: for you shall die, and not live.
2 Kings 20:6
6 I will add to your days fifteen years; and I will deliver you and this city out of the hand of the king of Assyria; and I will defend this city for my own sake, and for my servant David's sake.
Jonah 3:10
10 God saw their works, that they turned from their evil way. God repented of the evil which he said he would do to them, and he didn't do it.