Leviticus 4:18-20

New Century Version

¹⁸ Then he must put some of the blood on the corners of the altar that is before the Lord in the Meeting Tent. The priest must pour out the rest of the blood at the bottom of the altar of burnt offering, which is at the entrance to the Meeting Tent. ¹⁹ He must remove all the fat from the animal and burn it on the altar; ²⁰ he will do the same thing with this bull that he did with the first bull of the sin offering. In this way the priest removes the sins of the people so they will belong to the Lord and be forgiven.