15  And thou shalt anoint them, as thou didst anoint their father, that they may minister unto me in the priest's office: for their anointing shall surely be an everlasting priesthood throughout their generations.

  18  And the Lord confirmed a priesthood also upon ^bAaron and his seed, throughout all their generations, which priesthood also continueth and abideth forever with the priesthood which is after the holiest order of God.

  16  No man has a legal right to this office, to hold the keys of this priesthood, except he be a literal descendant of Aaron.