Leviticus 16:11-14

“Aaron shall present the bull of the sin offering, which is for himself, and shall make atonement for himself and for his house, and shall kill the bull of the sin offering which is for himself. He shall take a censer full of coals of fire from off the altar before the LORD, and two handfuls of sweet incense beaten small, and bring it within the veil. He shall put the incense on the fire before the LORD, that the cloud of the incense may cover the mercy seat that is on the covenant, so that he will not die. He shall take some of the blood of the bull, and sprinkle it with his finger on the mercy seat on the east; and before the mercy seat he shall sprinkle some of the blood with his finger seven times.