Leviticus 4:23-28

if his sin which he has committed is made known to him, he shall bring a goat, a male without blemish as his offering. He shall lay his hand on the head of the male goat [transferring symbolically his guilt to the sacrifice], and kill it in the place where they kill the burnt offering before the LORD; it is a sin offering. Then 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 the rest of its blood he shall pour out at the base of the altar of burnt offering. And he shall offer all its fat up in smoke on the altar like the fat from the sacrifice of peace offerings; so the priest shall make atonement for him in regard to his sin, and he will be forgiven. ‘If anyone of the common people sins unintentionally by doing any of the things the LORD has commanded not to be done, and becomes guilty, if his sin which he has committed is made known to him, then he shall bring a goat, a female without blemish as his offering for the sin which he has committed.