The Lord hath sworn, and will not repent, Thou art a priest for ever after the order of Melchizedek (110:4)

--Hebrews--

As he saith also in another [place], Thou [art] a priest for ever after the order of Melchisedec. (5:6)

Whither the forerunner is for us entered, [even] Jesus, made an high priest for ever after the order of Melchisedec. (6:20)

And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest, (7:15)

For he testifieth, Thou [art] a priest for ever after the order of Melchisedec. (7:17)