NUM 15:24

24 If you or they sin [by forgetting to obey these instructions] and none of the Israeli people realize that they were doing that, one young bull as an offering for all the people [must be brought to the priest]. That will be pleasing to me [when it is burned on the altar]. They must also bring to me a grain offering and an offering of wine, and a male goat, to be sacrificed to enable me to forgive them for the sins they have committed.