Melchizedek Priesthood
Christ with Three Nephite Disciples by Gary L. Kapp
KnoWhy #330
“Now they were ordained after this manner—being called with a holy calling, and ordained with a holy ordinance, and taking upon them the high priesthood of the holy order, which calling, and ordinance, and high priesthood, is without beginning or end”
Alma 13:8
Melchizedek Blessing Abraham by Walter Rane via lds.org
KnoWhy #120
"Yea, humble yourselves even as the people in the days of Melchizedek, who was also a high priest after this same order which I have spoken, who also took upon him the high priesthood forever."
Alma 13:14