As he saith also in another place,— The explication of this follows in ch. 7. The apostle had quoted from the second psalm in the preceding verse; when therefore it follows, as he saith also in another (for there is no word in the original for place,) it seems more natural to supply the word psalm, than place.
Related Commentaries of Hebrews 5:6
Hebrews 5:6
6 As he saith also in another place, Thou art a priest for ever after the order of Melchisedec.