Hebrews 7:17

For he testifieth
That is, either David, the penman of the psalm, or rather the Holy Ghost, the enditer of it, or God in the Scripture, in ( Psalms 110:4 ) of this form of citing Scripture, (See Gill on Hebrews 2:6).

thou art a priest for ever after the order of Melchisedec;
see ( Hebrews 5:6 Hebrews 5:10 ) ( 6:20 ) .