Genesis 47:20-25

So Joseph bought all the land of Egypt for Pharaoh; for every Egyptian sold his field because the famine was severe upon them. So the land became Pharaoh’s. And as for the people, he relocated them [temporarily] to cities from one end of Egypt’s border to the other. Only the land of the priests he did not buy, for the priests had an allotment from Pharaoh, and they lived on the amount which Pharaoh gave them, so they did not sell their land. Then Joseph said to the people, “Look, today I have bought you and your land for Pharaoh; now, here is seed for you, and you shall plant the land. At harvest time [when you reap the increase] you shall give one-fifth of it to Pharaoh, and four-fifths will be your own to use for seed for the field and as food for you and those of your households and for your little ones.” And they said, “You have saved our lives! Let us find favor in the sight of my lord, and we will be Pharaoh’s servants.”