Genesis 41:34-36

Then Pharaoh should appoint supervisors over the land and let them collect one-fifth of all the crops during the seven good years. Have them gather all the food produced in the good years that are just ahead and bring it to Pharaoh’s storehouses. Store it away, and guard it so there will be food in the cities. That way there will be enough to eat when the seven years of famine come to the land of Egypt. Otherwise this famine will destroy the land.”