Chabad.org — English translation + Rashi
Torah Temimah points to Toras Kohanim (Sifra), Vayikra Dibbura DeChovah, on 4:21 (chatas ha-kahal hu — it is the assembly’s chatas) (unit 2; single primary locus per emergency Core plan).
Sefaria — Sifra / Toras Kohanim, Vayikra Dibbura DeChovah
English: “It is the chatas of the assembly” — the chatas of the assembly.
Designation of communal chatas — this bull is expressly the community’s sin-offering.
The verse itself labels the offering “the chatas of the assembly.” This designation confirms its communal character and distinguishes it from the individual or High-Priestly chatas offerings treated in the surrounding sections.