After the death of Aaron's two sons, the LORD spoke to Moses, saying…
"Tell your brother Aaron that he must not enter the Most Holy Place whenever he chooses, or he will die, for I appear in the cloud above the atonement cover. This is how he is to enter: with a young bull for a sin offering and a ram for a burnt offering. He shall wear sacred linen garments, bathe in water, and present the offerings from the community: two male goats and a ram.
Aaron is to cast lots for the two goats—one for the LORD and the other as the scapegoat. The goat for the LORD is sacrificed for a sin offering, while the scapegoat is presented alive to carry the sins of the Israelites into the desert. Aaron shall make atonement for himself, his household, and all Israel, sprinkling the blood of the offerings on the atonement cover and the altar.
He shall confess over the live goat all the wickedness and rebellion of the Israelites, sending it away into a solitary place in the desert. Then Aaron shall bathe, put on his regular garments, and offer the burnt offerings for himself and the people. The hides, flesh, and offal of the sin offerings are to be burned outside the camp.
This is a lasting ordinance: on the tenth day of the seventh month, all must deny themselves and refrain from work, for atonement is made and the people are cleansed from all their sins. The anointed high priest shall perform this annual rite, making atonement for the Most Holy Place, the Tent of Meeting, the altar, the priests, and all the people, as the LORD commanded Moses."
The LORD then instructed Moses to tell Aaron, his sons, and all Israel that any animal sacrifice—ox, lamb, or goat—must be brought to the entrance of the Tent of Meeting. Offering sacrifices elsewhere is considered bloodshed, and the person shall be cut off from the community.
All sacrifices are to be presented to the LORD through the priest, who sprinkles the blood on the altar and burns the fat as a pleasing aroma. The Israelites must not offer sacrifices to idols or consume blood, for the life of a creature is in its blood, and it is given for atonement.
Anyone hunting or eating an animal must drain its blood and cover it with earth. Eating anything found dead or torn by wild animals requires washing and bathing, or the person is considered ceremonially unclean.