Hebrews 7:11-14

11Now if perfection could have been attained through the Levitical priesthood (for on this basis the people received the law), why was there still need for another priest to appear—one in the order of Melchizedek and not in the order of Aaron? 12For when the priesthood is changed, the law must be changed as well.

13He of whom these things are said belonged to a different tribe, from which no one has ever served at the altar. 14For it is clear that our Lord descended from Judah, a tribe as to which Moses said nothing about priests.