Deuteronomy 8:16-20

16who fed you in the wilderness with manna, which your fathers did not know, that He might humble you and that He might test you, to do you good in the end—

17then you say in your heart, ‘My power and the might of my hand have gained me this wealth.’

18“And you shall remember the Lord your God, for it is He who gives you power to get wealth, that He may establish His covenant which He swore to your fathers, as it is this day.

19Then it shall be, if you by any means forget the Lord your God, and follow other gods, and serve them and worship them, I testify against you this day that you shall surely perish.

20As the nations which the Lord destroys before you, so you shall perish, because you would not be obedient to the voice of the Lord your God.