1 Kings 11:4-6

Amplified Bible

⁴ For when Solomon was old, his wives turned his heart away after other gods; and his heart was not completely devoted to the Lord his God, as was the heart of his father David. ⁵ For Solomon went after Ashtoreth, the [fertility] goddess of the Sidonians, and after Milcom the horror (detestable idol) of the Ammonites.^{(A) 6} Solomon did evil [things] in the sight of the Lord, and did not follow the Lord fully, as his father David had done.