1 Kings 11:4-8
11:4 When Solomon became old, his wives shifted his allegiance to other gods; he was not wholeheartedly devoted to the Lord his God, as his father David had been.
11:5 Solomon worshiped the Sidonian goddess Astarte and the detestable Ammonite god Milcom.
11:6 Solomon did evil in the Lord’s sight; he did not remain loyal to the Lord, like his father David had.
11:7 Furthermore, on the hill east of Jerusalem Solomon built a high place for the detestable Moabite god Chemosh and for the detestable Ammonite god Milcom.
11:8 He built high places for all his foreign wives so they could burn incense and make sacrifices to their gods.