Hebrews 7:17 in the King James Version
For he testifieth, Thou art a priest for ever after the order of Melchisedec.
Context
16 who has been made, not after the law of a fleshly commandment, but after the power of an endless life;
17 for it is testified, “You are a priest forever, according to the order of Melchizedek.”
18 For there is an annulling of a foregoing commandment because of its weakness and uselessness