Leviticus 16:11-14

Aaron is to present the bull for his sin offering to make things right for himself and his household by killing the bull as his own sin offering. Then he will fill up an incense burner with burning coals from the altar that is before the Lord, and with his hands full of finely ground sweet-smelling incense, take them behind the veil. In the presence of the Lord he will put the incense on the burning coals, and the smoke from the incense will cover the atonement cover above the Testimony, so that he will not die. He will take some of the bull's blood and with his finger sprinkle it on the east side of the atonement cover. He shall also sprinkle some of it with his finger seven times in front of the atonement cover.