Hebrews 7:11-14

11Now if perfection was through the Levitical priesthood (for based on it the people had been given the Torah), what further need was there for a different kohen to arise—designated according to the order of Melechizedek , not according to the order of Aaron?

12For whenever the priesthood is altered, out of necessity an alteration of law also takes place.

13For the one about whom these things are said belongs to another tribe, from which no one has officiated at the altar.

14For it is clear that our Lord has sprung forth from Judah—concerning this tribe, Moses said nothing about kohanim.