Jonah 3:4
Jonah began to go into the city, going a day's journey. And he called out, "Yet forty days, and Nineveh shall be overthrown!"
Deuteronomy 18:22
when a prophet speaks in the name of the LORD, if the word does not come to pass or come true, that is a word that the LORD has not spoken; the prophet has spoken it presumptuously. You need not be afraid of him.
Jeremiah 18:7-10
If at any time I declare concerning a nation or a kingdom, that I will pluck up and break down and destroy it,
2 Kings 20:1
In those days Hezekiah became sick and was at the point of death. And Isaiah the prophet the son of Amoz came to him and said to him, "Thus says the LORD, 'Set your house in order, for you shall die; you shall not recover.'"
2 Kings 20:6
and I will add fifteen years to your life. 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
When God saw what they did, how they turned from their evil way, God relented of the disaster that he had said he would do to them, and he did not do it.