King of Nineveh repents

The King and the People of Nineveh Repenting c. 1586
Crispin de Passe, Maarten de Vos
Image Harris Schrank Fine Prints

When Jonah’s warning reached the king of Nineveh, he rose from his throne, took off his royal robes, covered himself with sackcloth and sat down in the dust.

Jonah 3:6 

What a reaction from the great king of Nineveh!
Somewhat similar situation is described in the Second Book of Kings that may actually be related to the Book of Jonah more than in one way.

King Josiah repents

When the king heard the words of the Book of the Law, he tore his robes. He gave these orders to Hilkiah the priest, Ahikam son of Shaphan, Akbor son of Micaiah, Shaphan the secretary and Asaiah the king’s attendant: “Go and inquire of the Lord for me and for the people and for all Judah about what is written in this book that has been found. Great is the Lord’s anger that burns against us because those who have gone before us have not obeyed the words of this book; they have not acted in accordance with all that is written there concerning us.”

Hilkiah the priest, Ahikam, Akbor, Shaphan and Asaiah went to speak to the prophet Huldah, who was the wife of Shallum son of Tikvah, the son of Harhas, keeper of the wardrobe. She lived in Jerusalem, in the New Quarter.

She said to them, “This is what the Lord, the God of Israel, says: Tell the man who sent you to me,  ‘This is what the Lord says: I am going to bring disaster on this place and its people, according to everything written in the book the king of Judah has read. Because they have forsaken me and burned incense to other gods and aroused my anger by all the idols their hands have made, my anger will burn against this place and will not be quenched.’  Tell the king of Judah, who sent you to inquire of the Lord, ‘This is what the Lord, the God of Israel, says concerning the words you heard: Because your heart was responsive and you humbled yourself before the Lord when you heard what I have spoken against this place and its people—that they would become a curse[b] and be laid waste—and because you tore your robes and wept in my presence, I also have heard you, declares the Lord. Therefore I will gather you to your ancestors, and you will be buried in peace. Your eyes will not see all the disaster I am going to bring on this place.’”

So they took her answer back to the king.
2 Kings 22:14-20

King Josiah ruled c. 649–609 BC which is during the time of the conquest of Nineveh in 612 BC.