Deuteronomy 9:4-5

4“After the Lord your God has done this for you, don’t say in your hearts, ‘The Lord has given us this land because we are such good people!’ No, it is because of the wickedness of the other nations that he is pushing them out of your way.

5It is not because you are so good or have such integrity that you are about to occupy their land. The Lord your God will drive these nations out ahead of you only because of their wickedness, and to fulfill the oath he swore to your ancestors Abraham, Isaac, and Jacob.