Albert Barnes' Notes on the Whole Bible - Hebrews 9:25
Nor yet that he should offer himself often - The Jewish high priest entered the most holy place with blood once every year. In this respect the offering made by Christ, and the work which he performed, differed from that of the Jewish high priest. It was not needful that he should enter the holy place but once. Having entered there, he permanently remains there.With the blood of others - That is, with the blood of calves, and goats. This is a second point in which the work of Christ differs... read more
The Pulpit Commentary - Hebrews 9:25-26
Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others ( i.e. blood not his own, ἀλλοτρίῳ ) ; for then must he often have suffered since the foundation of the world: but now (probably νυνί , not νῦν , meaning "as it is ") once at the end of the ages hath he appeared (rather, been manifested , πεφανέρωται ) to put away sin by the sacrifice of himself. Here (as above noted) the idea of ἐφάπαξ in ... read more