1 Kings 11:5-9

5He followed Ashtoreth the goddess of the Sidonians, and Molek the detestable god of the Ammonites.

6So Solomon did evil in the eyes of the LORD ; he did not follow the LORD completely, as David his father had done. 7On a hill east of Jerusalem, Solomon built a high place for Chemosh the detestable god of Moab, and for Molek the detestable god of the Ammonites.

8He did the same for all his foreign wives, who burned incense and offered sacrifices to their gods. 9The LORD became angry with Solomon because his heart had turned away from the LORD, the God of Israel, who had appeared to him twice.