Joshua 13:6

Them will I drive out from before the children of Israel, presently after thy death, if the Israelites do not hinder it by their unbelief or wickedness. Though they be now unconquered, yet divide them, partly, as a pledge to assure them of my help in conquering them after thy death; partly, to lay an obligation upon the Israelites to proceed in conquering work, and to bear witness against them in case they did not; and partly, as a wall of partition between them and the Canaanites, to prevent all agreements, contracts, and confederacies with them, to which God saw they began to incline.