Leviticus 4:18-20

Amplified Bible

¹⁸ He shall put some of the blood on the horns of the altar [of incense] which is before the Lord in the Tent of Meeting; and he shall pour out all the rest of the blood at the base of the altar of burnt offering which is at the doorway of the Tent of Meeting. ¹⁹ He shall remove all its fat from the bull and offer it up in smoke on the altar. ²⁰ He shall also do with the bull just as he did with the bull of the sin offering; that is what he shall do with this. So the priest shall make atonement for [the sin of] the people, and they will be forgiven.