Leviticus 4:27-31

‘If anyone of the common people sins unintentionally by doing something against any of the commandments of the LORD in anything which ought not to be done, and is guilty, or if his sin which he has committed comes to his knowledge, then he shall bring as his offering a kid of the goats, a female without blemish, for his sin which he has committed. And he shall lay his hand on the head of the sin offering, and kill the sin offering at the place of the burnt offering. Then the priest shall take some of its blood with his finger, put it on the horns of the altar of burnt offering, and pour all the remaining blood at the base of the altar. He shall remove all its fat, as fat is removed from the sacrifice of the peace offering; and the priest shall burn it on the altar for a sweet aroma to the LORD. So the priest shall make atonement for him, and it shall be forgiven him.