Albert Barnes Commentary 1 Kings 11:1

"Now king Solomon loved many foreign women, together with the daughter of Pharaoh, women of the Moabites, Ammonites, Edomites, Sidonians, and Hittites;" — 1 Kings 11:1 (ASV)

In noting Solomon’s excessive accumulation of silver and gold (1 Kings 10:14–25), his multiplication of horses (1 Kings 10:26–29), and his multiplication of wives, the writer clearly has in mind the Mosaic law's warning against these three forms of royal extravagance, all of which were forbidden to an Israelite king.

Zidonians - That is, Phoenician women. A tradition states that Solomon married a daughter of Hiram, king of Tyre.