2 Bible Verses about Priesthood, In Ot

since He had received from God the title of a High Priest with the rank of Melchizedek.

Now if perfection had been reached through the Levitical priesthood -- for on it as a basis even the law was enacted for the people-- what further need would there have been of appointing a different priest, with the rank of Melchizedek, instead of designating one with the rank of Aaron? For when a change in the priesthood takes place, a change in its law necessarily takes place. For He of whom this is said became a member of a different tribe no member of which ever officiated at the altar.read more.
For it is very clear that our Lord sprang from Judah, a tribe about which Moses said nothing as to priests. And it is still more overwhelmingly clear, since a different priest in the likeness of Melchizedek is appointed, who is appointed not on the basis of a physical qualification but on the basis of a power flowing from a life that cannot end. For the Scripture bears witness: "You are a priest forever, with the rank of Melchizedek."