Hebrews 5:3

And by reason hereof he ought, as for the people, so also for himself, to offer for sins.

Because of this, he must offer sacrifices for sins for the people, as well as for himself.

and by reason thereof is bound, as for the people, so also for himself, to offer for sins.

and because of this infirmity he ought, as for the people, so also for himself to offer for sins;

That is why he is obligated to offer sacrifices for his own sins, as well as for the sins of the people.