Hebrews 5:4-5
And no one takes this honor upon himself but is called to it by God, as Aaron was.
Hebrews 5:10
since He had received from God the title of a High Priest with the rank of Melchizedek.
Hebrews 7:11-14
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?
Hebrews 7:23-28
And the Levitical priests, on the one hand, have become numerous, because they have been prevented by death from continuing in office,