Joseph Benson's Commentary of the Old and New Testaments - Hebrews 7:20-22
Hebrews 7:20-22. And inasmuch as, &c. Here is another argument from the words of the psalmist, to prove the appointment of a new priesthood, the removal of the old, and the superior excellence of the new to the old; not without an oath Which argues the weightiness of the matter, and the eternal continuance of Christ’s priesthood. “The apostle’s reasoning here is founded on this, that God never interposed his oath except to show the certainty and immutability of the thing sworn. Thus... read more
Albert Barnes' Notes on the Whole Bible - Hebrews 7:20
And inasmuch as not without an oath - In addition to every other consideration showing the superiority of Christ as a priest, there was the solemnity of the oath by which he was set apart to the office. The appointment of one to the office of priest by an oath, such as occurred in the case of Jesus, was much more solemn and important than where the office was received merely by descent. read more