'Priest Forever' in the Bible

The Lord has sworn [an oath] and will not change His mind:“You are a priest foreverAccording to the order of Melchizedek.”

also said in another passage, You are a priest forever in the order of Melchizedek.

where Jesus has entered [in advance] as a forerunner for us, having become a High Priest forever according to the order of Melchizedek.

to whom Abraham apportioned one tenth of all the spoil, who is first, as his name shows, king of righteousness and then king of Salem, which means king of peace??3 with no father or mother or ancestry, and with no beginning to his days nor end to his life, but like no one but the Son of God, continues as priest forever.

without father, mother, or genealogy,having neither beginning of days nor end of life,but resembling the Son of God—remains a priest forever.

For it is attested [by God] of Him,“You (Christ) are a Priest foreverAccording to the order of Melchizedek.”

And as he was not [constituted] without swearing,??21 for they were made priests without swearing, but he with swearing by him who says to him, The Lord swore, and he will not change, You are a priest forever;??22 by so much is Jesus the pledge of a better covenant.

(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’”).

For the Law appoints to the high priesthood men full of imperfection; but this utterance about the making of the oath, which came long after the Law, appoints a son, fully qualified to be high priest forever.