Parashas Acharei Mos · Passuk 16:25
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “He shall burn” — he burns even on Shabbos and even in a state of tumah.
Scope of the burning obligation
The burning of the chelev of the chatat proceeds even when ordinary restrictions of Shabbos or tumah would otherwise intervene.