Leviticus 4:21

4:21 He must bring the rest of the bull outside the camp and burn it just as he burned the first bull – it is the sin offering of the assembly.

Leviticus 16:11

The Sin Offering Sacrificial Procedures

16:11 “Aaron is to present the sin offering bull which is for himself, and he is to make atonement on behalf of himself and his household. He is to slaughter the sin offering bull which is for himself,