Leviticus 16:27, 30

But the bull of the sin offering and the goat of the sin offering, whose blood was brought in to make atonement in the holy place, shall be taken outside the camp, and they shall burn their hides, their flesh, and their refuse in the fire.

for it is on this day that atonement shall be made for you to cleanse you; you will be clean from all your sins before the LORD.