Deuteronomy 8:16-20

16He fed you manna in the wilderness, [a substance] which your fathers did not know, so that He might humble you [by dependence on Him] and that He might test you, to do good [things] for you at the end.

17Otherwise, you may say in your heart, ‘My power and the strength of my hand made me this wealth.’

18But 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.

19And 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.

20Like 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.