2 Chronicles 34:3-4

3During the eighth year of his reign, while he was still young, Josiah began to seek the God of his ancestor David. Then in the twelfth year he began to purify Judah and Jerusalem, destroying all the pagan shrines, the Asherah poles, and the carved idols and cast images.

4He ordered that the altars of Baal be demolished and that the incense altars which stood above them be broken down. He also made sure that the Asherah poles, the carved idols, and the cast images were smashed and scattered over the graves of those who had sacrificed to them.