The Chataat-offering
Requires Beit HaMikdash
VaYikra 6:18 Speak to Aharon and his sons, saying: this is the law of the chataat-offering. In the place where the olah-offering is slaughtered, the chataat-offering shall be slaughtered, before Hashem; it is holy of holies [most holy].
We are commanded that the Chataat (sin)-offering, whatever it might be, must be offered in the manner specified by Torah. The Chataat-offering, the Olah-offering, and the Asham (guilt)-offering were considered as the Most Holy Things, while the Shelamim (peace)-offering, the Todah (thanksgiving)-offering, and the Firstling, the Tithe of Cattle, and the Pesach-offering were regarded as the Lesser Holy Things. The former, in so far as they were consumed, had to be consumed within the Sanctuary Court, while the Lesser Holy Things might be eaten anywhere in Yerushalayim.