Genesis 47:24-26 Tree of Life Version (TLV)
24 During the harvest you must give a fifth part to Pharaoh and four-fifths will be for you, for seed for the field and for your food, and for those in your houses, and for food for your little ones.”
25 “You’ve saved our lives,” they said. “We find favor in the eyes of my lord, and we’ll be Pharaoh’s slaves.” 26 So Joseph set it as a statute until this very day concerning the land of Egypt: a fifth-part goes to Pharaoh. Only the priests’ land did not become Pharaoh’s.