Deuteronomy 8:16-20

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

17Beware lest you say in your heart, 'My power and the might of my hand have gotten me this wealth.'

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.