1 Kings 11:4-6

King James 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 the Lord his God, as was the heart of David his father.

⁵ For Solomon went after Ashtoreth the goddess of the Zidonians, and after Milcom the abomination of the Ammonites.

⁶ And Solomon did evil in the sight of the Lord, and went not fully after the Lord, as did David his father.