1 Kings 11:4-6

American Standard Version

⁴ For it came to pass, when Solomon was old, that his wives turned away his heart after other gods; and his heart was not perfect with Jehovah his God, as was the heart of David his father. ⁵ For Solomon went after Ashtoreth the goddess of the Sidonians, and after Milcom the abomination of the Ammonites. ⁶ And Solomon did that which was evil in the sight of Jehovah, and went not fully after Jehovah, as did David his father.