“For the priesthood being changed, there is of necessity a change made also in the law.”
Hebrews 7:12 (WEB)
Context Reading
10for he was yet in the body of his father when Melchizedek met him. 11Now if perfection was through the Levitical priesthood (for under it the people have received the law), what further need was there for another priest to arise after the order of Melchizedek, and not be called after the order of Aaron? 12For the priesthood being changed, there is of necessity a change made also in the law. 13For he of whom these things are said belongs to another tribe, from which no one has officiated at the altar. 14For it is evident that our Lord has sprung out of Judah, about which tribe Moses spoke nothing concerning priesthood.