Deuteronomy 8:12-14

12Lest when thou hast eaten and art full, and hast built goodly houses, and dwelt in them ; 13And when thy herds and thy flocks multiply, and thy silver and thy gold are increased, and all that thou hast is increased; 14Then thy heart shall be lifted up, and thou shalt forget the LORD thy God, who brought thee out of the land of Egypt, from the house of bondage;