Hebrews 5:6

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

For he testifieth, Thou art a priest for ever after the order of Melchisedec.

(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:)

Without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually.

Called of God an high priest after the order of Melchisedec.

Whither the forerunner is for us entered, even Jesus, made an high priest for ever after the order of Melchisedec.

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