Genesis 41:33–36

Now therefore let Pharaoh select a man discreet and wise, and set him over the land of Egypt.  Let Pharaoh proceed to appoint overseers over the land, and take the fifth part of the produce of the land of Egypt during the seven plenteous years.  And let them gather all the food of these good years that are coming, and lay up grain under the authority of Pharaoh for food in the cities, and let them keep it.  That food shall be a reserve for the land against the seven years of famine which are to befall the land of Egypt, so that the land may not perish through the famine.”