For word came unto the king of Nineveh, and he arose from his throne, and he laid his robe from him, and covered him with sackcloth, and sat in ashes. Word came unto the king - This, some think, was Pul; others, Sardanapalus his son, king of Assyria, who flourished in the reign of Jeroboam the Second: but it seems more probable that the monarch here alluded to was a king of Assyria contemporary with Joash, king of Judah. It was by the decree of the king that the fast was instituted, and became general.
Related Commentaries of Jonah 3:6
Jonah 3:6
6 For word came unto the king of Nineveh, and he arose from his throne, and he laid his robe from him, and covered him with sackcloth, and sat in ashes.