'Order of Melchizedek' in the Bible

The LORD hath sworn, and will not repent, Thou art a priest for ever after the order of Melchizedek.

as he saith also in another place, Thou art a priest for ever After the order of Melchizedek.

named of God a high priest after the order of Melchizedek.

whither as a forerunner Jesus entered for us, having become a high priest for ever after the order of Melchizedek.

Now if there was perfection through the Levitical priesthood (for under it hath the people received the law), what further need was there that another priest should arise after the order of Melchizedek, and not be reckoned after the order of Aaron?

And this is still more abundantly clear when we read that it is as belonging to the order of Melchizedek that a priest of a different kind is to arise,

for it is witnessed of him, Thou art a priest for ever After the order of Melchizedek.

(for those Levites who formerly became priests [received their office] without [its being confirmed by the taking of] an oath, but this One [was designated] with an oath through the One who said to Him,“The Lord has swornAnd will not change His mind or regret it,‘You (Christ) are a Priest forever’”).