Leviticus 4:15

4:15 the elders of the congregation must lay their hands on the head of the bull before the Lord, and someone must slaughter the bull before the Lord.

Leviticus 4:20-21

4:20 He must do with the rest of the bull just as he did with the bull of the sin offering; this is what he must do with it. So the priest will make atonement on their behalf and they will be forgiven. 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 8:14

Consecration Offerings

8:14 Then he brought near the sin offering bull and Aaron and his sons laid their hands on the head of the sin offering bull,

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,