Hebrews 7:12 in the King James Version
For the priesthood being changed, there is made of necessity a change also of the law.
Context
11 Now 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?
12 For the priesthood being changed, there is of necessity a change made also in the law.
13 For he of whom these things are said belongs to another tribe, from which no one has officiated at the altar.