2 Samuel 20:25American Standard Version

Genesis 47:22

Only the land of the priests bought he not: for the priests had a portion from Pharaoh, and did eat their portion which Pharaoh gave them; wherefore they sold not their land.

Genesis 47:26

And Joseph made it a statute concerning the land of Egypt unto this day, that Pharaoh should have the fifth; only the land of the priests alone became not Pharaoh`s.

Exodus 19:6

and ye shall be unto me a kingdom of priests, and a holy nation. These are the words which thou shalt speak unto the children of Israel.

Exodus 19:22

And let the priests also, that come near to Jehovah, sanctify themselves, lest Jehovah break forth upon them.

Exodus 19:24

And Jehovah said unto him, Go, get thee down; and thou shalt come up, thou, and Aaron with thee: but let not the priests and the people break through to come up unto Jehovah, lest he break forth upon them.