NET

21 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’”—

Darby

21 (for they are become priests without the swearing of an oath, but he with the swearing of an oath, by him^D9057 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];)

Darby Bible Notes

him - Or 'to him.' .

KJV

21 (For those priests were made without an oath^K7184; 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:)

KJV Bible Notes

without an oath: Or, without swearing of an oath.