Then it shall be, if ought be committed by ignorance without the knowledge of the congregation, that all the congregation shall offer one young bullock for a burnt offering, for a sweet savour unto the LORD, with his meat offering, and his drink offering, according to the manner, and one kid of the goats for a sin offering.
If someone does something wrong without knowing it, the whole group must sacrifice a young bull and a goat. The bull is a burnt offering that smells good to God, along with its food and drink offerings, all done properly. The goat is a sin offering.