Parallel
Genesis 47:26
Brenton's English Septuagint · Berean Standard Bible
And Joseph appointed it to them for an ordinance until this day; to reserve a fifth part for Pharao, on the land of Egypt, except only the land of the priests, that was not Pharao's.
So Joseph established a law that a fifth of the produce belongs to Pharaoh, and it is in effect in the land of Egypt to this day. Only the priests’ land does not belong to Pharaoh.