Leviticus 4:25-27

²⁵Then the priest is to take some of the blood of the sin offering with his finger and put it on the horns of the altar of burnt offering, and pour out the rest of the blood at the bottom of the altar.

²⁶He shall burn all its fat on the altar like the fat of the peace offerings. In this way the priest will make the man's sin right, and he will be forgiven.

²⁷If any other Israelite sins unintentionally and does what is not permitted by any of the commandments of the Lord his God, he is guilty.