Because of this he is obligated to offer sacrifice for his own sins just as he does for those of the people.
We have here an account of the nature of the priestly office in general, though with an accommodation to the Lord Jesus Christ. We are told, I. Of what kind of beings the high priest must be. He must be taken from among men; he must be a man, one of ourselves, bone of our bones, flesh of our flesh, and spirit of our spirits...
Commenting on Hebrews 5:1-9
And by reason hereof,.... Because of his sinful infirmity: he ought, as for the people, so also for himself to offer for sins; as he offered sacrifice for the sins of the people, so he was obliged to offer for his own sins; in this Christ differed from the high priest, for he had no sin of his own to offer for, Heb 7:27 but...
Verse 3. And by reason hereof. Because he is a sinner--an imperfect man. As for the people, so also for himself, to offer for sins. To make an expiation for sins. He needs the same atonement; he offers the sacrifice for himself which he does for others, The same thing is true of the ministers of religion now.