Hebrews 7:20-22 Amplified Bible, Classic Edition (AMPC)

²⁰ And it was not without the taking of an oath [that Christ was made Priest],

²¹ For those who formerly became priests received their office without its being confirmed by the taking of an oath by God, but this One was designated and addressed and saluted with an oath, The Lord has sworn and will not regret it or change His mind, You are a Priest forever according to the order of Melchizedek.

²² In keeping with [the oath’s greater strength and force], Jesus has become the Guarantee of a better (stronger) agreement [a more excellent and more advantageous covenant].