2 Kings 23:28

Josiah lived for 13 years after the celebration of his great Passover. Of this period we know absolutely nothing, except that in the course of it he seems to have submitted himself to Nabopolassar; who, after the fall of Nineveh, was accepted as the legitimate successor of the Assyrian monarchs by all the nations of the western coast. Josiah, after perhaps a little hesitation (see Jeremiah 2:18, Jeremiah 2:36), followed the example of his neighbors, and frankly accepted the position of an Assyro-Babylonian tributary. In this state matters remained until 608 B.C., when the great events happened which are narrated in 2 Kings 23:29.