“‘If his offering for a peace offering sacrifice to the Lord is from the flock, he must present a flawless male or female.

“‘If his offering is from the flock for a burnt offering – from the sheep or the goats – he must present a flawless male,

Then he must bring his guilt offering to the Lord, a flawless ram from the flock, convertible into silver shekels, for a guilt offering to the priest.

“Speak to the Israelites and tell them, ‘When someone among you presents an offering to the Lord, you must present your offering from the domesticated animals, either from the herd or from the flock.

and he must bring his penalty for guilt to the Lord for his sin that he has committed, a female from the flock, whether a female sheep or a female goat, for a sin offering. So the priest will make atonement on his behalf for his sin.

“When a person commits a trespass and sins by straying unintentionally from the regulations about the Lord’s holy things, then he must bring his penalty for guilt to the Lord, a flawless ram from the flock, convertible into silver shekels according to the standard of the sanctuary shekel, for a guilt offering.

and must bring a flawless ram from the flock, convertible into silver shekels, for a guilt offering to the priest. So the priest will make atonement on his behalf for his error which he committed (although he himself had not known it) and he will be forgiven.