Parashas Acharei Mos · Passuk 17:11
Chabad.org — English translation + Rashi
Torah Temima points to Zevachim 26b.
English: “On the altar to atone” — once the blood has reached the altar the owners are atoned; it was given for kapparah and for nothing else.
Moment of kapparah
Kapparah is effected the moment the blood arrives on the altar; the blood’s purpose is exclusively atonement.