Hebrews 5:3
And for this reason he is required to offer sin-offerings not only for the people but also for himself.
Hebrews 5:1
For every High Priest is chosen from among men, and is appointed to act on behalf of men in matters relating to God, in order to offer both gifts and sin-offerings,
Hebrews 9:7
But into the second, the High Priest goes only on one day of the year, and goes alone, taking with him blood, which he offers on his own behalf and on account of the sins which the people have ignorantly committed.
Hebrews 7:27-28
who, unlike other High Priests, is not under the necessity of offering up sacrifices day after day, first for His own sins, and afterwards for those of the people; for this latter thing He did once for all when He offered up Himself.