Deuteronomy 8:18-20

But you shall remember [with profound respect] the LORD your God, for it is He who is giving you power to make wealth, that He may confirm His covenant which He swore (solemnly promised) to your fathers, as it is this day. And it shall come about if you ever forget the LORD your God and follow other gods and serve them and worship them, I testify against you today that you will most certainly perish. Like the nations which the LORD causes to perish before you, so shall you perish; because you would not listen to and obey the voice of the LORD your God.