Doctrine and Covenants — Revelation through Joseph Smith…
“ Amen.13 And now, concerning the items in addition to the covenants and commandments, they are these14 There remain hereafter, in the due time of the Lord, other bishops to be set apart unto the church, to minister even according to the first;15 Wherefore they shall be high priests who are worthy, and they shall be appointed by the First Presidency of the Melchizedek Priesthood, except they be literal descendants of Aaron.16 And if they be literal descendants of Aaron they have a legal right to the bishopric, if they are the firstborn among the sons of Aaron ”
