6 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 offeringa ; and the priest shall make atonement for them for their sin.

Read Leviticus 5:6 Using Other Translations

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.
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.
Then you must bring to the LORD as the penalty for your sin a female from the flock, either a sheep or a goat. This is a sin offering with which the priest will purify you from your sin, making you right with the LORD .