Leviticus 4:20-21

20He will do with this bull what he did with the bull for the sin offering. This is how the priest will atone for the sins of the people. God will forgive them when the priest does this.

21The priest will take the dead animal outside the camp. He will put it on the ashes from the altar fire. He will burn the animal as he did the first bull. This is the sin offering for all the people.