Leviticus 16:11-14

11And Aaron shall bring the bullock of the sin offering, which is for himself, and shall make an atonement for himself, and for his house, and shall kill the bullock of the sin offering which is for himself:

12And he shall take a censer full of burning coals of fire from off the altar before Yhwh, and his hands full of sweet incense beaten small, and bring it within the vail:

13And he shall put the incense upon the fire before Yhwh, that the cloud of the incense may cover the mercy seat that is upon the testimony, that he die not:

14And he shall take of the blood of the bullock, and sprinkle it with his finger upon the mercy seat eastward; and before the mercy seat shall he sprinkle of the blood with his finger seven times.