Jonah 3:2-3

3:2 “Go immediately to Nineveh, that large city, and proclaim to it the message that I tell you.” 3:3 So Jonah went immediately to Nineveh, as the Lord had said. (Now Nineveh was an enormous city – it required three days to walk through it!)

Jonah 3:6

3:6 When the news reached the king of Nineveh, he got up from his throne, took off his royal robe, put on sackcloth, and sat on ashes.