2 Chronicles 34:1-4 NIV
Josiah was eight years old when he became king, and he reigned in Jerusalem thirty-one years. He did what was right in the eyes of the LORD and followed the ways of his father David, not turning aside to the right or to the left.
In the eighth year of his reign, while he was still young, he began to seek the God of his father David. In his twelfth year he began to purge Judah and Jerusalem of high places, Asherah poles and idols. Under his direction the altars of the Baals were torn down; he cut to pieces the incense altars that were above them, and smashed the Asherah poles and the idols. These he broke to pieces and scattered over the graves of those who had sacrificed to them.
NIV: New International Version