'Order of Melchizedek' in the Bible

and again, Thou art a priest forever, after the order of Melchizedek.

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

whither Jesus himself is entered as a forerunner on our behalf, having become a priest forever, after 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 the words are in evidence, Thou art a priest forever after the order of Melchizedek.