Hebrews 7: 19-28

19: For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God.
20: And inasmuch as not without an oath he was made priest:
21: (For those priests were made without an oath; but this with an oath by him that said unto him, The Lord sware and will not repent, Thou art a priest for ever after the order of Melchisedec:)
22: By so much was Jesus made a surety of a better testament.
23: And they truly were many priests, because they were not suffered to continue by reason of death:
24: But this man, because he continueth ever, hath an unchangeable priesthood.
25: Wherefore he is able also to save them to the uttermost that come unto God by him, seeing he ever liveth to make intercession for them.
26: For such an high priest became us, who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens;
27: Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people's: for this he did once, when he offered up himself.
28: For the law maketh men high priests which have infirmity; but the word of the oath, which was since the law, maketh the Son, who is consecrated for evermore.