2 Kings 21:3

21:3 He rebuilt the high places that his father Hezekiah had destroyed; he set up altars for Baal and made an Asherah pole just like King Ahab of Israel had done. He bowed down to all the stars in the sky and worshiped them.

2 Kings 21:6

21:6 He passed his son through the fire and practiced divination and omen reading. He set up a ritual pit to conjure up underworld spirits, and appointed magicians to supervise it. He did a great amount of evil in the sight of the Lord, provoking him to anger.