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.

2 Kings 21:16

21:16 Furthermore Manasseh killed so many innocent people, he stained Jerusalem with their blood from end to end, in addition to encouraging Judah to sin by doing evil in the sight of the Lord.