Hebrews 5:4-6

King James Version

⁴ And no man taketh this honour unto himself, but he that is called of God, as was Aaron.

⁵ So also Christ glorified not himself to be made an high priest; but he that said unto him, Thou art my Son, to day have I begotten thee.

⁶ As he saith also in another place, Thou art a priest for ever after the order of Melchisedec.