Leviticus 4:20-21

²⁰And he shall do to the calf as he did to the calf of the sin-offering, so shall it be done; and the priest shall make atonement for them, and the trespass shall be forgiven them.

²¹And they shall carry forth the calf whole without the camp, and they shall burn the calf as they burnt the former calf: it is the sin-offering of the congregation.