Leviticus 16:24-34

24and he shall bathe his flesh in water in a holy place, and put on his garments, and come forth, and offer his burnt-offering and the burnt-offering of the people, and make atonement for himself and for the people. 25And the fat of the sin-offering shall he burn upon the altar. 26And he that letteth go the goat for Azazel shall wash his clothes, and bathe his flesh in water, and afterward he shall come into the camp. 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 home-born, 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 Jehovah. 31It is a sabbath of solemn rest unto you, and ye shall afflict your souls; it is a statute for ever. 32And the priest, who shall be anointed and who shall be consecrated to be priest in his father’s stead, shall make the atonement, and shall put on the linen garments, even the holy garments: 33and he shall make atonement for the holy sanctuary; and he shall make atonement for the tent of meeting and for the altar; and he shall make atonement for the priests and for all the people of the assembly. 34And this shall be an everlasting statute unto you, to make atonement for the children of Israel because of all their sins once in the year. And he did as Jehovah commanded Moses.