2 Chronicles 34:1-3

1Josiah was eight years old when he began to reign; and he reigned thirty-one years in Jerusalem.

2And he did what was right in the sight of Jehovah, and walked in the ways of David his father, and turned not aside to the right hand nor to the left.

3And in the eighth year of his reign, while he was yet young, he began to seek after the 1God of David his father; and in the twelfth year he began to purge Judah and Jerusalem from the high places, and the Asherahs, and the graven images, and the molten images.