Genesis 47:24-26 Common English Bible (CEB)
24 When the crop comes in, you must give one-fifth to Pharaoh. You may keep four-fifths for yourselves, for planting fields, and for feeding yourselves, those in your households, and your children.”
25 The people said, “You’ve saved our lives. If you wish, we will be Pharaoh’s slaves.” 26 So Joseph made a law that still exists today: Pharaoh receives one-fifth from Egypt’s farmland. Only the priests’ farmland didn’t become Pharaoh’s.