Reference for Yoma 121:8
נתן מקצת מתנות שבהיכל ונשפך הדם יביא דם אחר ויתחיל בתחילה בהיכל רבי אלעזר ור' שמעון אומרים אינו מתחיל אלא ממקום שפסק
R'Simeon said: Just as the blood of the he-goat [the rites of which are] performed within obtains atonement for Israel in all matters of impurity touching the Sanctuary and its holy things,<span class="x" onmousemove="('comment',' Without confession. As there was no confession with that he-goat.');"><sup>9</sup></span> thus also does the blood of the bullock obtain atonement for the priests in all matters of impurity touching the Sanctuary and its holy things; and just as the confession over the he-goat-to-be-sent-away obtains atonement for Israel with regard to all other transgressions, so does the confession over the bullock obtain atonement for the priest for all other transgressions.<span class="x" onmousemove="('comment',' V. Sheb. 13b.');"><sup>10</sup></span>