2 Bible Verses about Priesthood, In Ot

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

If, then, Perfection had been attainable through the Levitical priesthood--and it was under this priesthood that the people received the Law--why was it still necessary that a priest of a different order should appear, a priest of the order of Melchizedek and not of the order of Aaron? With the change of the priesthood a change of the Law became a necessity. And he of whom all this is said belonged to quite a different tribe, no member of which has ever served at the altar.read more.
For it is plain that our Lord ad sprung from the tribe of Judah, though of that tribe Moses said nothing about their being priests. All this becomes even yet plainer when we remember that a new priest has appeared, resembling Melchizedek, and that he was appointed, not under a Law regulating only earthly matters, but by virtue of a life beyond the reach of death; for that is the meaning of the declaration-- 'Thou art for all time a priest of the order of Melchizedek.'