[Heb 10:11-15 KJV] 11 And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins: 12 But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God; 13 From henceforth expecting till his enemies be made his footstool. 14 For by one offering he hath perfected for ever them that are sanctified. 15 [Whereof] the Holy Ghost also is a witness to us: for after that he had said before,
Priesthood of Christ
Surety of a Better Testament
By so much was Jesus made a surety of a better testament. – Hebrews 7:22
A Change of Priesthood
[Heb 7:11-14, 16-17 KJV] 11 If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need [was there] that another priest should rise after the order of Melchisedec, and not be called after the order of Aaron? 12 For the priesthood being changed, there is made of necessity a change also of the law. 13 For he of whom these things are spoken pertaineth to another tribe, of which no man gave attendance at the altar. 14 For [it is] evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood. … 16 Who is made, not after the law of a carnal commandment, but after the power of an endless life. 17 For he testifieth, Thou [art] a priest for ever after the order of Melchisedec.
King of Salem
[Heb 7:1-2 KJV] 1 For this Melchisedec, king of Salem, priest of the most high God, who met Abraham returning from the slaughter of the kings, and blessed him; 2 To whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace;