1 Kings 9:20-22

20All the people who were left of the Amorites, the Hittites, the Perizzites, the Hivites, and the Jebusites, who were not of the people of Israel—

21their descendants who were left after them in the land, whom the people of Israel were unable to devote to destruction—these Solomon drafted to be slaves, and so they are to this day.

22But of the people of Israel Solomon made no slaves. They were the soldiers, they were his officials, his commanders, his captains, his chariot commanders and his horsemen.