Deuteronomy 8:18-20

18You shall remember the Lord your God, for it is he who gives you power to get wealth, that he may confirm his covenant that he swore to your fathers, as it is this day.

19And if you forget the Lord your God and go after other gods and serve them and worship them, I solemnly warn you today that you shall surely perish.

20Like the nations that the Lord makes to perish before you, so shall you perish, because you would not obey the voice of the Lord your God.