'Priests' in the Bible

However, he did not purchase land belonging to the priests, because the priests held an allotment, previously provided to them by Pharaoh, from which they lived. That's why they did not sell their land.

So Joseph crafted a statute concerning Egypt that remains valid to this day that Pharaoh should own a fifth of the produce, excluding the land belonging to the priests, which remained outside of Pharaoh's control.