Leviticus 16:27, 30

But the calf and the he-goat, which were immolated for sin, and whose blood was brought into the Sanctuary to complete the expiation, these shall be carried outside the camp and be burned with fire: as with their skins, so also with their flesh and dung.

On this day, there shall be atonement for you, and also a cleansing from all your sins. You shall be cleansed in the sight of the Lord.