Wherefore I abhor myself, and repent in dust and ashes.
Jonah began to go into the city, going a day's journey. And he called out, "Yet forty days, and Ninevah shall be overthrown!" And the people of Ninevah believed God. They called for a fast and put on sackcloth, from the greatest of them to the least of them. The word reached the king of Ninevah, and he arose from his throne, removed his robe, covered himself with sackcloth, and sat in ashes. (Jonah 3:4-6) [above image is Gustave Dore's Jonah Preaching to the Ninevites]