Genesis 47:20-25

Then Joseph bought all the land of Egypt for Pharaoh; for every man of the Egyptians sold his field, because the famine was severe upon them. So the land became Pharaoh’s. And as for the people, he moved them into the cities, from one end of the borders of Egypt to the other end. Only the land of the priests he did not buy; for the priests had rations allotted to them by Pharaoh, and they ate their rations which Pharaoh gave them; therefore they did not sell their lands. Then Joseph said to the people, “Indeed I have bought you and your land this day for Pharaoh. Look, here is seed for you, and you shall sow the land. And it shall come to pass in the harvest that you shall give one-fifth to Pharaoh. Four-fifths shall be your own, as seed for the field and for your food, for those of your households and as food for your little ones.” So they said, “You have saved our lives; let us find favor in the sight of my lord, and we will be Pharaoh’s servants.”