Chabad.org — English translation + Rashi
Torah Temimah points to Horayos 4a (unit 6; single primary locus per emergency Core plan).
E-Daf.com — Horayos 4a
HebrewBooks / Shas PDF
English: “And a matter is hidden” — and not that the entire commandment is uprooted.
Miyut of total uprooting — communal chatas applies when part of a law is forgotten, not when an entire mitzvah is abolished.
The he’elem that generates the communal bull is the forgetting of a particular detail within a mitzvah, not the complete uprooting of the mitzvah itself. If the Sanhedrin were to abolish an entire commandment, the resulting error would fall outside the scope of this verse. Only a limited, partial concealment produces the liability.