'Priest Forever' in the Bible

Jehovah sware and he will not lament, Thou a priest forever according to the manner of Melchizedeck.

And also in another he says, Thou a priest forever according to the order of Melchisedec.

Where the forerunner, Jesus, went in for us, according to the order of Melchisedec, being a high priest forever.

For he testifies, Thou a priest forever, according to the order of Melchisedec.

(For they truly without sacrifice sanctioned by solemn oath became priests; but he with the sacrifice sanctioned by solemn oath by him, saying to him, The Lord sware, and will not repent, Thou priest forever, according to the order of Melchisedec:)