NASB
"(for they indeed became priests without an oath, but He with an oath through the One who said to Him, "THE LORD HAS SWORN AND WILL NOT CHANGE HIS MIND, 'YOU ARE A PRIEST FOREVER'");"
— Hebrews 7:21, NASB
“(For those priests were made without an oath; but this with an oath by him that said unto him, The Lord sware and will not repent, Thou art a priest for ever after the order of Melchisedec:)”
“(for they indeed have been made priests without an oath; but he with an oath by him that saith of him, The Lord sware and will not repent himself, Thou art a priest for ever); ”
“(for they indeed have been made priests without an oath), but he with an oath by him that says of him, "The Lord swore and will not change his mind, 'You are a priest forever, according to the order of Melchizedek.'"”
“but Jesus did so with a sworn affirmation by the one who said to him,“The Lord has sworn and will not change his mind,‘You are a priest forever’”–”
“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).”
“(For those were made priests without an oath, but this one was made a priest with an oath by him who says of him, The Lord gave his oath, which he will not take back, that you are a priest for ever);”
“(For those priests were made without an oath; but this with an oath by him that said unto him, The Lord sware and will not repent, Thou art a priest for ever after the order of Melchisedec:)”
For, on the one hand, there is a setting aside of a former commandment because of its weakness and uselessness
(for the Law made nothing perfect), and on the other hand there is a bringing in of a better hope, through which we draw near to God.
And inasmuch as it was not without an oath
(for they indeed became priests without an oath, but He with an oath through the One who said to Him, "THE LORD HAS SWORN AND WILL NOT CHANGE HIS MIND, 'YOU ARE A PRIEST FOREVER'");
so much the more also Jesus has become the guarantee of a better covenant.
The former priests, on the one hand, existed in greater numbers because they were prevented by death from continuing,
but Jesus, on the other hand, because He continues forever, holds His priesthood permanently.