Deuteronomy 8:15-18

15He led you through the great and terrible wilderness with its poisonous snakes and scorpions, a thirsty land where there was no water. He brought water out of the flint rock for you.

16He fed you in the wilderness with manna, which your ancestors had not known, in order to humble and test you, so that in the end he might cause you to prosper.

17You may say to yourself, ‘My power and my own ability have gained this wealth for me,’

18but remember that the Lord your God gives you the power to gain wealth, in order to confirm his covenant he swore to your ancestors, as it is today.