After the death of Aaron's sons, the Lord warns that Aaron must not come at any time into the Most Holy Place, behind the veil, or he will die, because God appears there in the cloud over the mercy seat. He may enter only with a bull as a sin offering and a ram as a burnt offering, bathed and dressed in holy linen garments. From the people he receives two male goats and a ram.
Aaron first offers the bull for himself and his household. He enters with a censer full of coals and two handfuls of incense, so that the cloud covers the mercy seat, and sprinkles blood on it and before it. The two goats are chosen by lot: one for the Lord and one for Azazel. The first is sacrificed as the sin offering for the people, and its blood is sprinkled in the same way, to cleanse the sanctuary from the uncleanness and rebellion of Israel.
Then Aaron lays both hands on the live goat, confesses over it all the iniquities and rebellions of the people, and a man leads it into the wilderness. The high priest bathes, changes clothes and offers the burnt offerings. The bodies of the sin offerings are burned outside the camp. The day is the tenth of the seventh month: the people are to humble themselves and not work, and it is a solemn rest and a lasting statute.