1 Kings 9:20-22

20Now several non-Israelite peoples were left in the land after the conquest of Joshua, including the Amorites, Hittites, Perizzites, Hivites, and Jebusites.

21Their descendants remained in the land (the Israelites were unable to wipe them out completely). Solomon conscripted them for his work crews, and they continue in that role to this very day.

22Solomon did not assign Israelites to these work crews; the Israelites served as his soldiers, attendants, officers, charioteers, and commanders of his chariot forces.