Hebrews 7:8-12

8In one case, dying men receive tithes; but in the other, one about whom it is testified that he lives on.

9Through Abraham even Levi, the one receiving tithes, has paid the tithe, so to speak—

10for he was still in his father’s loins when Melechizedek met him.

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.