2 Kings 3:27

3:27 So he took his firstborn son, who was to succeed him as king, and offered him up as a burnt sacrifice on the wall. There was an outburst of divine anger against Israel, so they broke off the attack and returned to their homeland.

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.