Hebrews 5:3
and on account of this, he ought, as for the people, so also for himself, to make offering for sins.
Hebrews 5:1
For every high priest chosen from among men, is appointed for men, in things pertaining to God, that he may offer gifts and sacrifices for sins:
Hebrews 9:7
But into the second, the high priest alone went, once during the year, not without blood, which he offered for himself, and for the errors of the people:
Hebrews 7:27-28
who needs not daily, as those high priests, to offer up sacrifices, first for his own sins, and then for the sins of the people: for this he did once, when he offered up himself.