Hebrews 7:19-21

Young's Literal Translation

¹⁹ (for nothing did the law perfect) and the bringing in of a better hope, through which we draw nigh to God.

²⁰ And inasmuch as [it is] not apart from oath, (for those indeed apart from oath are become priests,

²¹ and he with an oath through Him who is saying unto him, `The Lord sware, and will not repent, Thou [art] a priest -- to the age, according to the order of Melchisedek;')