Genesis 41:34-36

Let Pharaoh do this, and let him appoint overseers over the land, and take up the fifth part of the land of Egypt in the seven plenteous years. And let them gather all the food of these good years that come, and lay up grain under the hand of Pharaoh for food in the cities, and let them keep it. And the food shall be for a store to the land against the seven years of famine, which shall be in the land of Egypt; that the land perish not through the famine.