See Bible: Psalm 110
Hebrews 5:6 As He also says in another place: “You are a priest forever According to the order of Melchizedek”;
Hebrews 5:10 called by God as High Priest “according to the order of Melchizedek,”
Hebrews 6:20 where the forerunner has entered for us, even Jesus, having become High Priest forever according to the order of Melchizedek.
Hebrews 7:1 [The King of Righteousness] For this Melchizedek, king of Salem (Hebrew meaning: King of Peace), priest of the Most High God, who met Abraham returning from the slaughter of the kings and blessed him,
Hebrews 7:10 For he was still in the loins of his father when Melchizedek met him.
Hebrews 7:11 [Need for a New Priesthood] Therefore, if perfection were through the Levitical priesthood (for under it the people received the law), what further need was there that another priest should rise according to the order of Melchizedek, and not be called according to the order of Aaron?
Hebrews 7:15 And it is yet far more evident if, in the likeness of Melchizedek, there arises another priest
Hebrews 7:17 For He testifies: “You are a priest forever According to the order of Melchizedek.”
Hebrews 7:21 (For they have become priests without an oath, but He with an oath by Him who said to Him: “The Lord has sworn And will not relent, ‘You are a priest forever According to the order of Melchizedek’ ”),