Genesis 47:20-25

So Joseph bought all the land of Egypt for Pharaoh, for all the Egyptians sold their fields, because the famine was severe on them. The land became Pharaoh’s. As for the people, he made servants of them from one end of Egypt to the other. Only the land of the priests he did not buy, for the priests had a fixed allowance from Pharaoh and lived on the allowance that Pharaoh gave them; therefore they did not sell their land. Then Joseph said to the people, “Behold, I have this day bought you and your land for Pharaoh. Now here is seed for you, and you shall sow the land. And at the harvests you shall give a fifth to Pharaoh, and four fifths shall be your own, as seed for the field and as food for yourselves and your households, and as food for your little ones.” And they said, “You have saved our lives; may it please my lord, we will be servants to Pharaoh.”