Hebrews 7:3

7:3 Without father, without mother, without genealogy, he has neither beginning of days nor end of life but is like the son of God, and he remains a priest for all time.

Hebrews 7:15

7:15 And this is even clearer if another priest arises in the likeness of Melchizedek,

Hebrews 7:17

7:17 For here is the testimony about him: “You are a priest forever in the order of Melchizedek.”

Hebrews 7:21

7:21 but Jesus did so with a sworn affirmation by the one who said to him, “The Lord has sworn and will not change his mind, ‘You are a priest forever’” –