For his forced labor Solomon used the descendants of the people of Canaan whom the Israelites had not killed when they took possession of their land. These included Amorites, Hittites, Perizzites, Hivites, and Jebusites, whose descendants continue to be slaves down to the present time.
Solomon did not make slaves of Israelites; they served as his soldiers, officers, commanders, chariot captains, and cavalry.
There were 550 officials in charge of the forced labor working on Solomon's various building projects.
Solomon filled in the land on the east side of the city, after his wife, the daughter of the king of Egypt, had moved from David's City to the palace Solomon built for her.
Three times a year Solomon offered burnt offerings and fellowship offerings on the altar he had built to the Lord. He also burned incense to the Lord. And so he finished building the Temple. 1
References for 1 Kings 9:25
9.25 Ex 23.17; 34.23; Dt 16.16.
King Solomon also built a fleet of ships at Eziongeber, which is near Elath on the shore of the Gulf of Aqaba, in the land of Edom.
King Hiram sent some experienced sailors from his fleet to serve with Solomon's men.
They sailed to the land of Ophir and brought back to Solomon about sixteen tons of gold.