Chabad.org — English translation + Rashi
Torah Temimah points to Horayos 7a.
E-Daf.com — Horayos 7a
HebrewBooks / Shas PDF
English: Might one think: if he ruled and others acted after his ruling he is liable? The verse says “and he shall offer for his sin that he has sinned” — for what he himself sinned he brings.
Miyut of followers’ acts — the High Priest brings only for his own act, not for others who followed his ruling.
The High Priest brings only for his own act, not for others who followed his ruling. One might have thought that a High Priest who issued an erroneous ruling would be liable for the acts performed by those who relied on it. The verse’s language “for his sin that he has sinned” restricts the offering to the High Priest’s own personal sin and excludes the acts of followers.