2 Chronicles 33:6
New International Version (NIV)
6 He sacrificed his children in the fire in the Valley of Ben Hinnom, practiced divination and witchcraft, sought omens, and consulted mediums and spiritists. He did much evil in the eyes of the LORD, arousing his anger.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=2+Chronicles+33.6&version=NIV