Leviticus 16:1-6

¹And the LORD spoke unto Moses, after the death of the two sons of Aaron, when they drew near before the LORD, and died;

²and the LORD said unto Moses: 'Speak unto Aaron thy brother, that he come not at all times into the holy place within the veil, before the ark-cover which is upon the ark; that he die not; for I appear in the cloud upon the ark-cover.

³Herewith shall Aaron come into the holy place: with a young bullock for a sin-offering, and a ram for a burnt-offering.

⁴He shall put on the holy linen tunic, and he shall have the linen breeches upon his flesh, and shall be girded with the linen girdle, and with the linen mitre shall he be attired; they are the holy garments; and he shall bathe his flesh in water, and put them on.

⁵And he shall take of the congregation of the children of Israel two he-goats for a sin-offering, and one ram for a burnt-offering.

⁶And Aaron shall present the bullock of the sin-offering, which is for himself, and make atonement for himself, and for his house.