2 Kings 23:25-29

There was no king like him before or after [Josiah] who turned to the Lord with all his heart and all his soul and all his might, according to all the Law of Moses.

Still the Lord did not turn from the fierceness of His great wrath, kindled against Judah because of all the provocations with which Manasseh had provoked Him.

And the Lord said, I will remove Judah also out of My sight as I have removed Israel, and will cast off this city, Jerusalem, which I have chosen, and the house, of which I said, My Name [and the pledge of My presence] shall be there.

The rest of the acts of Josiah, all that he did, are they not written in the Book of the Chronicles of Judah's Kings?

In his days Pharaoh Necho king of Egypt went up against the king of Assyria to the river Euphrates. King Josiah went out against him, but he slew Josiah at Megiddo when he saw him.