Leviticus 4:27-31

“If anyone of the common people sins unintentionally in doing any one of the things that by the LORD’s commandments ought not to be done, and realizes his guilt, or the sin which he has committed is made known to him, he shall bring for his offering a goat, 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 in the place of burnt offering. And the priest shall take some of its blood with his finger and put it on the horns of the altar of burnt offering and pour out all the rest of its blood at the base of the altar. And all its fat he shall remove, as the fat is removed from the peace offerings, and the priest shall burn it on the altar for a pleasing aroma to the LORD. And the priest shall make atonement for him, and he shall be forgiven.