Jonah is the story of a prophet sent by God to Nineveh. Jonah is fearful of the call and tries to flee by sea to Tarshish. During the sea voyage he is thrown overboard by his fellow passengers and swallowed by a great fish sent by God. The prophet is saved and goes on to Nineveh to successfully convert the people of that city.

Jonah 3

3:5 So the people of Nineveh believed God, and proclaimed a fast, and put on sackcloth, from the greatest of them even to the least of them.