Melchizedek received the priesthood through the lineage of his fathers, even till Noah; and from Noah till Enoch, through the lineage of their fathers; and from Enoch to Abel, who received the priesthood by the hand of his father Adam, who was the first man. Abraham, when speaking of the holy priesthood which he obtained from Melchizedek, notes that: “It was conferred upon me from the fathers; it came down from the fathers, from the beginning of time, yea, even from the beginning, or before the foundation of the earth, down to the present time, even the right of the firstborn, or the first man, who is Adam, or first father, through the fathers unto me.” Thus, Melchizedek received his priesthood through the lineage of his fathers, even till Noah, [means my priesthood came down in time from Adam to Noah, my father]; from Noah till Enoch through the lineage of their fathers [means my priesthood lineage descended from Adam via Enoch to Noah, my father, through the lineage of their fathers]; for this priesthood was received from Enoch to Abel, who received the priesthood by the hand of his father Adam. The priesthood lineage is very clearly recorded: a descending pedigree lineage, anciently from the man Adam, to Abel his son, (who was a brother of Seth, the son of Adam: the lineage ancestry of Noah).– http://academic-genealogy.com/ancientandmoderngenealogies.htm#013