As the law prescribed that the priesthood should be of the order of Aaron, a new priesthood, not of that order, must set aside the law.
Pertaineth to another tribe (φυλῆς ἑτέρας μετέσχηκεν)
Lit. hath partaken of another tribe. Not only another, but a different tribe; one not specially set apart to sacerdotal service.
Of which no man gave attendance at the altar (ἀφ' ἧς οὐδεὶς προσέσχηκεν τῷ θυσιαστηρίῳ)
Προσέχειν originally to bring to; bring the mind to; attend to. See on Heb 2:1. θυσιαστήριον altar, oClass. Strictly an altar for the sacrifice of victims; but used of the altar of incense, Luk 1:11; Rev 8:3; comp. Exo 30:1. See on Act 17:23. It was also used of the enclosure in which the altar stood. See Ignat. Eph. v; Trall. vii. See Lightfoot's interesting note, Ignatius and Polycarp, Vol. II., p. 43.