Leviticus 5:6

he shall bring to the Lord as his compensation for the sin that he has committed , a female from the flock , a lamb or a goat , for a sin offering . And the priest shall make atonement for him for his sin .

As a penalty for the sin they have committed, they must bring to the Lord a female lamb or goat from the flock as a sin offering; and the priest shall make atonement for them for their sin.

And he shall bring his trespass offering unto the Lord for his sin which he hath sinned, a female from the flock, a lamb or a kid of the goats, for a sin offering; and the priest shall make an atonement for him concerning his sin.