King James Version (KJV) - Genesis 47:26 >

And Joseph made it a law over the land of Egypt unto this day, [that] Pharaoh should have the fifth [part;] except the land of the priests only, [which] became not Pharaoh’s.

Berean Study Bible (BSB) - Genesis 47:26 >

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.