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.

However, he did not execute their sons. He obeyed the Lord’s commandment as recorded in the law scroll of Moses, “Fathers must not be executed for what their sons do, and sons must not be executed for what their fathers do. A man must be executed only for his own sin.”