'Priest Forever' in the Bible

As he also in another place speaketh, "Thou art a priest forever after the order of Melchizedek."

whither the forerunner is for us entered in, I mean Jesus that is made a high priest forever, after the order of Melchizedek.

without father, without mother, without kin, and hath neither beginning of his time, neither yet end of his life: but is likened unto the son of God, and continueth a priest forever.

For he testifieth, "Thou art a priest forever, after the order of Melchizedek."

Those priests were made without an oath: but this priest with an oath, by him that said unto him, "The Lord sware, and will not repent: Thou art a priest forever after the order of Melchizedek."