"Arise, go to Nineveh, that great city, and preach against it, for their wickedness has come up before me."
Nineveh did not survive after Jonah long, only about 200 years passing till it was utterly and completely destroyed, showing that their repentance was partial and incomplete.  Yet, significantly, God's purpose in using Nineveh as his razor to punish Israel was made possible by the greater power and glory that came to the great Assyrian city after their brief period of repentance and seeking the blessing of God. The city fell in 612 B.C.