NET Bible
"Now several non-Israelite peoples were left in the land after the conquest of Joshua, including the Hittites, Amorites, Perizzites, Hivites, and Jebusites."
— 2 Chronicles 8:7, NET Bible
“As for all the people that were left of the Hittites, and the Amorites, and the Perizzites, and the Hivites, and the Jebusites, which were not of Israel,”
“As 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; ”
“As for all the people who were left of the Hittites, and the Amorites, and the Perizzites, and the Hivites, and the Jebusites, who were not of Israel;”
“All the people that were left of the Hethites, and the Amorrhites, and the Pherezites, and the Hevites, and the Jebusites, that were not of the stock of Israel:”
“As for all the rest of the Hittites and the Amorites and the Perizzites and the Hivites and the Jebusites, who were not of Israel:”
“As for all the people that were left of the Hittites, and the Amorites, and the Perizzites, and the Hivites, and the Jebusites, which were not of Israel,”
He built up Tadmor in the wilderness and all the storage cities he had built in Hamath.
He made upper Beth Horon and lower Beth Horon fortified cities with walls and barred gates,
and built up Baalath, all the storage cities that belonged to him, and all the cities where chariots and horses were kept. He built whatever he wanted in Jerusalem, Lebanon, and throughout his entire kingdom.
Now several non-Israelite peoples were left in the land after the conquest of Joshua, including the Hittites, Amorites, Perizzites, Hivites, and Jebusites.
Their descendants remained in the land(the Israelites were unable to wipe them out). Solomon conscripted them for his work crews and they continue in that role to this very day.
Solomon did not assign Israelites to these work crews; the Israelites served as his soldiers, officers, charioteers, and commanders of his chariot forces.
These men worked for King Solomon as supervisors; there were a total of 250 of them who were in charge of the people.