Jonah 3:4-5

Jonah began to go into the city, going a days journey.
And he called out, "Yet forty days, and Nineveh shall be overthrown!"
And the people of Nineveh believed God.
They called for a fast and put on sackcloth, from the greatest of them to the least of them.

Jonah 3 4 5

Repentance of Nineveh, c. 1840
John Martin (English, 1789-1854)