And he says in another place, "You are a priest forever, in the order of Melchizedek." (NIV)
As He says also in another place, You are a Priest [appointed] forever after the order (with the rank) of Melchizedek. [Ps. 110:4.] (AMP)
As he saith also in another place, Thou art a priest for ever after the order of Melchisedec. (KJV)