Aaron shall then slaughter the goat for the sin offering for the people and bring its blood behind the veil, and with its blood he must do as he did with the bull’s blood: He is to sprinkle it against the mercy seat and in front of it.
When the priest had come out from the sprinkling the blood of the bullock before the mercy-seat, 1. He must next kill the goat which was the sin-offering for the people (Lev 16:15) and go the third time into the holy of holies, to sprinkle the blood of the goat, as he had done that of the bullock; and thus he was to make atonement...
Commenting on Leviticus 16:15-19
Then shall he kill the goat of the sin offering that is for the people,.... That upon which the lot came for the Lord, Lev 16:9; the high priest having sprinkled the blood of the bullock, came out of the most holy place, and went into the court of the tabernacle to the altar of burnt offering, and on the north side of that slew...
Lev 16:15-16 After this he was to slay the he-goat as a sin-offering for the nation, for which purpose, of course, he must necessarily come back to the court again, and then take the blood of the goat into the most holy place, and do just the same with it as he had already done with that of the ox.
Commenting on Leviticus 16:15-17