Leviticus 4:24-27

²⁴And he shall lay his hand upon the head of the goat, and kill it in the place where they kill the burnt-offering before the LORD: it is a sin-offering.

²⁵And the priest shall take of the blood of the sin-offering with his finger, and put it upon the horns of the altar of burnt-offering, and shall pour out his blood at the bottom of the altar of burnt-offering.

²⁶And he shall burn all his fat upon the altar, as the fat of the sacrifice of peace-offerings: and the priest shall make an atonement for him as concerning his sin, and it shall be forgiven him.

²⁷And if any one of the common people shall sin through ignorance, while he doeth somewhat against any of the commandments of the LORD concerning things which ought not to be done, and be guilty;