2 Chronicles 34:1-3

1Josiah was eight years old when he became king, and he reigned 31 years in Jerusalem.

2He did right in the eyes of Adonai, and walked in the ways of his father David. He did not turn aside to the right or to the left.

3In the eighth year of his reign, while he was still young, he began to seek after the God of his father David. In the twelfth year he began to purge Judah and Jerusalem from the high places, the Asherah poles, and the carved and molten images.