2 Chronicles 28:3

28:3 He offered sacrifices in the Valley of Ben-Hinnom and passed his sons through the fire, a horrible sin practiced by the nations whom the Lord drove out before the Israelites.

2 Chronicles 33:6

33:6 He passed his sons through the fire in the Valley of Ben-Hinnom and practiced divination, omen reading, and sorcery. 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 and angered him.