Hebrews 7:20-25

And inasmuch as it is not without an oath (for the others indeed were made priests without an oath:

But this with an oath, by him that said unto him: The Lord hath sworn and he will not repent: Thou art a priest for ever).

By so much is Jesus made a surety of a better testament.

And the others indeed were made many priests, because by reason of death they were not suffered to continue:

But this, for that he continueth for ever, hath an everlasting priesthood:

Whereby he is able also to save for ever them that come to God by him; always living to make intercession for us.