Deuteronomy 8:12-14

lest, when you have eaten and are full, and have built fine houses, and lived in them;

and when your herds and your flocks multiply, and your silver and your gold is multiplied, and all that you have is multiplied;

then your heart might be lifted up, and you forget the LORD your God, who brought you out of the land of Egypt, out of the house of bondage;