2 Bible Verses about Priesthood, In Ot

while God himself pronounced him High Priest according to the order of Melchizedek.

Now if there were perfection through the Levitical priesthood, (and it was under it that the people received the Law) why was it still necessary for another kind of priest to arise, after the order of Melchizedek, instead of being reckoned according to the order of Aaron? For when the priesthood changes, of necessity the law also changes. He who is thus described belonged to another tribe, not one member of which has ever served at the altar.read more.
For it is evident that our Lord was descended from Judah, a tribe of which Moses said nothing concerning the priesthood. And this is yet more abundantly clear if, after the likeness of Melchizedek, there arises another Priest, who has become such, not according to the law of a transitory enactment, but according to the energy of an indissoluble life. For the words are in evidence, Thou art a priest forever after the order of Melchizedek.