Hebrews 7:15-22

And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest, who is made, not after the law of a carnal commandment, but after the power of an endless life. For he testifieth, Thou art a priest for ever After the order of Melchisedec. For there is verily a disannulling of the commandment going before for the weakness and unprofitableness thereof. For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God. And inasmuch as not without an oath he was made priest: (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:) By so much was Jesus made a surety of a better testament.