Genesis 47:20

47:20 So Joseph bought all the land of Egypt for Pharaoh. Each of the Egyptians sold his field, for the famine was severe. So the land became Pharaoh’s.

Genesis 47:26

47:26 So Joseph made it a statute, which is in effect to this day throughout the land of Egypt: One-fifth belongs to Pharaoh. Only the land of the priests did not become Pharaoh’s.