Deuteronomy 9:1-6

“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, a people great and tall, sons of Anakim, whom you know and of whom you have heard it said, ‘Who can stand before the sons of Anak?’ So know today [with confident assurance] that the LORD your God is crossing [the Jordan] before you like a devouring fire. He will destroy them and He will subdue them before you, and you shall drive them out and destroy them quickly, just as the LORD has promised you. “Do not say in your heart when the LORD your God has driven them out before you, ‘Because of my righteousness the LORD has brought me in to possess this land,’ but because of the wickedness of these nations the LORD is dispossessing them before you. 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. “Know [without any doubt], that the LORD your God is not giving you this good land to possess because of your righteousness, for you are a stiff-necked (stubborn, obstinate) people.