Hebrews 7:21-25

21(for they are become priests without the swearing of an oath, but he with the swearing of an oath, by him who said, as to him, The Lord has sworn, and will not repent [of it], Thou [art] priest for ever [according to the order of Melchisedec];)

22by so much Jesus became surety of a better covenant.

23And they have been many priests, on account of being hindered from continuing by death;

24but he, because of his continuing for ever, has the priesthood unchangeable.

25Whence also he is able to save completely those who approach by him to 1God, always living to intercede for them.