Leviticus 16:11-16

“Aaron will present his own bull as a sin offering to purify himself and his family, making them right with the LORD. After he has slaughtered the bull as a sin offering, he will fill an incense burner with burning coals from the altar that stands before the LORD. Then he will take two handfuls of fragrant powdered incense and will carry the burner and the incense behind the inner curtain. There in the LORD’s presence he will put the incense on the burning coals so that a cloud of incense will rise over the Ark’s cover—the place of atonement—that rests on the Ark of the Covenant. If he follows these instructions, he will not die. Then he must take some of the blood of the bull, dip his finger in it, and sprinkle it on the east side of the atonement cover. He must sprinkle blood seven times with his finger in front of the atonement cover. “Then Aaron must slaughter the first goat as a sin offering for the people and carry its blood behind the inner curtain. There he will sprinkle the goat’s blood over the atonement cover and in front of it, just as he did with the bull’s blood. Through this process, he will purify the Most Holy Place, and he will do the same for the entire Tabernacle, because of the defiling sin and rebellion of the Israelites.