and he said to Aaron, “Take for yourself a calf, a bull, for a sin offering and a ram for a burnt offering, both without defect, and offer them before the Lord.

Then to the sons of Israel you shall speak, saying, ‘Take a male goat for a sin offering, and a calf and a lamb, both one year old, without defect, for a burnt offering,

So Aaron came near to the altar and slaughtered the calf of the sin offering which was for himself.