As for all the people who remained of the Amorites, Hittites, Perizzites, Hivites, and Jebusites (the people who were not Israelites)—
We have here a further account of Solomon's greatness. I. His buildings. He raised a great levy both of men and money, because he projected a great deal of building, which would both employ many hands and put him to a vast expense, Kg1 9:15.
Commenting on 1 Kings 9:15-28
But of the children of Israel did Solomon make no bondmen,.... For that was contrary to the law; they might be hired servants, but not bond servants, Lev 25:39. but they were men of war; which he kept in pay, a standing army, maintained even in time of peace, in case of necessity, should an enemy attempt to invade or surprise them: and his servants...
[And] all the people [that were] left of the Amorites, Hittites, Perizzites, Hivites, and Jebusites, which [were] not of the children of Israel, (h) These were as bondmen and paid what was required, either labour or money.