Hebrews 5:6

And Melchizedek king of Salem brought out bread and wine; now he was a priest of God Most High.

Yahweh has sworn and will not change His mind, “You are a priest forever According to the order of Melchizedek.”

being designated by God as a high priest according to the order of Melchizedek.

where a forerunner has entered for us—Jesus, having become a high priest forever according to the order of Melchizedek.

And in this case mortal men receive tithes, but in that case one receives them, of whom it is witnessed that he lives on.

Now if perfection was through the Levitical priesthood (for on the basis of it the people received the Law), what further need was there for another priest to arise according to the order of Melchizedek, and not be designated according to the order of Aaron?

For it is witnessed about Him, “You are a priest forever According to the order of Melchizedek.”

(for they indeed became priests without an oath, but He with an oath through the One who said to Him, “The Lord has sworn And will not change His mind, ‘You are a priest forever’”);