Deuteronomy 8:11-15

Beware that thou forget not the LORD thy God, in not keeping his commandments, and his judgments, and his statutes, which I command thee this day: lest when thou hast eaten and art full, and hast built goodly houses, and dwelt therein; and when thy herds and thy flocks multiply, and thy silver and thy gold is multiplied, and all that thou hast is multiplied; then thine heart be lifted up, and thou forget the LORD thy God, which brought thee forth out of the land of Egypt, from the house of bondage; who led thee through that great and terrible wilderness, wherein were fiery serpents, and scorpions, and drought, where there was no water; who brought thee forth water out of the rock of flint