Leviticus 16:27-30

²⁷And the calf for the sin offering, and the goat for the sin offering, whose blood was brought in to make atonement in the holy place, they shall carry forth out of the camp, and burn them with fire, even their skins and their flesh and their dung.

²⁸And he that burns them shall wash his garments, and bathe his body in water, and afterward he shall enter into the camp.

²⁹And this shall be a perpetual statute for you; in the seventh month, on the tenth day of the month, ye shall humble your souls, and shall do no work, the native and the stranger who abides among you.

³⁰For in this day he shall make an atonement for you, to cleanse you from all your sins before the Lord, and ye shall be purged.