Deuteronomy 9:1, 5

“Hear, O Israel! You are crossing over the Jordan today to go in to dispossess nations greater and mightier 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 it is because of the wickedness of these nations that the LORD your God is driving them out before you, in order to confirm the oath which the LORD swore to your fathers, to Abraham, Isaac and Jacob.