LEVITICUS 16:27-30

²⁷And the bullock 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 carried forth without the camp; and they shall burn in the fire their skins, and their flesh, and their dung.

²⁸And he that burneth them shall wash his clothes, and bathe his flesh in water, and afterward he shall come into the camp.

²⁹And it shall be a statute for ever unto you: in the seventh month, on the tenth day of the month, ye shall afflict your souls, and shall do no manner of work, the homeborn, or the stranger that sojourneth among you:

³⁰for on this day shall atonement be made for you, to cleanse you; from all your sins shall ye be clean before the LORD.