Hebrews 7:9-12

9 One might even say that Levi, who collects the tenth, paid the tenth through Abraham,

10 because when Melchizedek met Abraham, Levi was still in the body of his ancestor.

11 Jesus Like Melchizedek
If perfection could have been attained through the Levitical priesthood (for on the basis of it the law was given to the people), why was there still need for another priest to come—one in the order of Melchizedek, not in the order of Aaron?

12 For when there is a change of the priesthood, there must also be a change of the law.