Deuteronomy 8:15-18

15who led you through the great and terrifying wilderness, with its fiery serpents and scorpions and thirsty ground where there was no water, who brought you water out of the flinty rock,

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.