Leviticus 16:6; Leviticus 16:15

6 "Then Aaron shall offer the bull for the sin offering which is for himself, that he may make atonement for himself and for his household.

15 "Then he shall slaughter the goat of the sin offering which is for the people, and bring its blood inside the veil and do with its blood as he did with the blood of the bull, and sprinkle it on the mercy seat and in front of the mercy seat.