Deuteronomy 9:1, 5

“Hear, O Israel! You are crossing the Jordan today to go in to dispossess nations greater and more powerful than you, great cities fortified to heaven

It is not for your righteousness or for the uprightness of your heart that you are going to possess their land, but because of the wickedness of these nations the LORD your God is driving them out before you, and to confirm the oath which the LORD swore to your fathers, to Abraham, Isaac, and Jacob.