Solomon loved many foreign women. Besides the daughter of the king of Egypt he married Hittite women and women from Moab, Ammon, Edom, and Sidon. 1
References for 1 Kings 11:1
He married them even though the Lord had commanded the Israelites not to intermarry with these people, because they would cause the Israelites to give their loyalty to other gods. 2
References for 1 Kings 11:2
11.2 Ex 34.16; Dt 7.3, 4.
Solomon married seven hundred princesses and also had three hundred concubines. They made him turn away from God,
and by the time he was old they had led him into the worship of foreign gods. He was not faithful to the Lord his God, as his father David had been.
He worshiped Astarte, the goddess of Sidon, and Molech, the disgusting god of Ammon.
He sinned against the Lord and was not true to him as his father David had been.
On the mountain east of Jerusalem he built a place to worship Chemosh, the disgusting god of Moab, and a place to worship Molech, the disgusting god of Ammon.
He also built places of worship where all his foreign wives could burn incense and offer sacrifices to their own gods.
Even though the Lord, the God of Israel, had appeared to Solomon twice and had commanded him not to worship foreign gods, Solomon did not obey the Lord but turned away from him. So the Lord was angry with Solomon
and said to him, "Because you have deliberately broken your covenant with me and disobeyed my commands, I promise that I will take the kingdom away from you and give it to one of your officials.
However, for the sake of your father David I will not do this in your lifetime, but during the reign of your son.
And I will not take the whole kingdom away from him; instead, I will leave him one tribe for the sake of my servant David and for the sake of Jerusalem, the city I have made my own."
So the Lord caused Hadad, of the royal family of Edom, to turn against Solomon.