1 Kings 11:4

For it came to pass, when Solomon was old, when he lost his youthful energy of spirit and heart, that his wives turned away his heart after other gods, causing him to become indifferent toward the strict and exclusive worship of Jehovah in Israel and more indulgent with regard to the heathen worship still maintained by the foreigners; and his heart was not perfect with the Lord, his God, it no longer belonged to the Lord in undivided loyalty, as was the heart of David, his father.