Leviticus 16:11-15

“Aaron shall bring the bull for his own sin offering to make atonement for himself and his household, and he is to slaughter the bull for his own sin offering. He is to take a censer full of burning coals from the altar before the LORD and two handfuls of finely ground fragrant incense and take them behind the curtain. He is to put the incense on the fire before the LORD, and the smoke of the incense will conceal the atonement cover above the tablets of the covenant law, so that he will not die. He is to take some of the bull’s blood and with his finger sprinkle it on the front of the atonement cover; then he shall sprinkle some of it with his finger seven times before the atonement cover. “He shall then slaughter the goat for the sin offering for the people and take its blood behind the curtain and do with it as he did with the bull’s blood: He shall sprinkle it on the atonement cover and in front of it.