2 Chronicles 34:1-3

1Josiah was eight years old when he became king, and he reigned thirty-one years in Jerusalem.

2He did what was right in the Lord’s sight and walked in the ways of his ancestor David; he did not turn aside to the right or the left.

3In the eighth year of his reign, while he was still a youth, Josiah began to seek the God of his ancestor David, and in the twelfth year he began to cleanse Judah and Jerusalem of the high places, the Asherah poles, the carved images, and the cast images.