Hebrews 7:12-17

12For when there is a change in the priesthood, there is of necessity a change of the law [concerning the priesthood] as well.

13For the One of whom these things are said belonged [not to the priestly line of Levi but] to another tribe, from which no one has officiated or served at the altar.

14For it is evident that our Lord descended from [the tribe of] Judah, and Moses mentioned nothing about priests in connection with that tribe.

15And this becomes even more evident if another priest arises in the likeness of Melchizedek,

16who has become a priest, not on the basis of a physical and legal requirement in the Law [concerning his ancestry as a descendant of Levi], but on the basis of the power of an indestructible and endless life.

17For it is attested [by God] of Him, “You (Christ) are a Priest forever According to the order of Melchizedek.”