Hebrews 7:11-14

MKJV(i) 11 Therefore if perfection were by the Levitical priesthood (for under it the people received the Law), what further need was there that another priest should rise after the order of Melchizedek, and not be called after the order of Aaron? 12 For the priesthood being changed, there is of necessity a change made in the law also. 13 For He of whom these things are spoken belongs to another tribe, from which no man gave attendance at the altar. 14 For it is evident that our Lord sprang out of Judah, of which tribe Moses spoke nothing concerning priesthood.