Deuteronomy 20:17

But thou shalt utterly destroy them - The above reasoning will gain considerable strength, provided we could translate ki hacharem tacharimem , thou shalt utterly subdue them - slaying them if they resist, and thus leaving nothing alive that breathed; or totally expel them from the land, or reduce them to a state of slavery in it, that they might no longer exist as a people. This certainly made them an anathema as a nation, wholly destroying their political existence. Probably this was so understood by the Gibeonites, viz., that they either must be slain or utterly leave the land, which last was certainly in their power, and therefore, by a stratagem, they got the princes of Israel to make a league with them. When the deceit was discovered, the Israelites, though not bound by their oath, because they were deceived by the Gibeonites, and therefore were under no obligation to fulfill their part of the covenant; yet, though they had this command before their eyes, did not believe that they were bound to put even those deceivers to death; but they destroyed their political existence, by making them hewers of wood and drawers of water to the congregation; i. e., slaves to the Israelites. (See Joshua 9). Rahab and her household also were spared. So that it does not appear that the Israelites believed that they were bound to put every Canaanite to death. Their political existence was under the anathema, and this the Hebrews annihilated.

That many of the Canaanites continued in the land even to the days of Solomon, we have the fullest proof; for we read, II Chronicles 8:7 : "All the people of the land that were left of the Hittites, Amorites, Perizzites, Hivites, and Jebusites, who were left in the land, whom the children of Israel consumed not, them did Solomon make to pay tribute to this day." Thus Solomon destroyed their political existence, but did not consider himself bound by the law of God to put them to death.