Deuteronomy 8:18-20

18Remember the Lord your God. He is the one who gives you power to be successful, in order to fulfill the covenant he confirmed to your ancestors with an oath.

19“But I assure you of this: If you ever forget the Lord your God and follow other gods, worshiping and bowing down to them, you will certainly be destroyed.

20Just as the Lord has destroyed other nations in your path, you also will be destroyed if you refuse to obey the Lord your God.