'Priests' in the Bible

Only the land of the priests he did not buy; for the priests had an assigned portion from Pharaoh, and ate their assigned portion which Pharaoh had given them; so they did not sell their land.

And Joseph made it a law over the land of Egypt to this day, that the fifth should be for Pharaoh, except the land of the priests: theirs alone did not become Pharaoh's.