2 Chronicles 8:7-10

⁷As for all the people that were left of the Hittites, and the Amorites, and the Perizzites, and the Hivites, and the Jebusites, that were not of Israel; ⁸of their children that were left after them in the land, whom the children of Israel consumed not, of them did Solomon raise a levy [of bondservants] unto this day. ⁹But of the children of Israel did Solomon make no servants for his work; but they were men of war, and chief of his captains, and rulers of his chariots and of his horsemen. ¹⁰And these were the chief officers of king Solomon, even two hundred and fifty, that bare rule over the people.