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.