And he shall bring for the expiation of his guilt unto the LORD a ram without blemish out of the flock, in thy estimation, for his guilt, unto the priest; Verse ConceptsRamsPerfect Sacrifices

Likewise this shall be the law of the expiation of guilt; it shall be most holy. Verse ConceptsAaron, Priestly ResponsibilitiesHoliness, As Set Apart For God

And he shall pay for the sin that he has done in the holy thing and shall add the fifth part thereto and give it unto the priest; and the priest shall reconcile him with the ram of the expiation of his guilt, and he shall have forgiveness. Finally, if a person commits a sin by doing any of these things which are forbidden to be done by the commandments of the LORD, without doing it knowingly, he is guilty and shall bear his iniquity. And he shall bring a ram without blemish out of the flock, in thy estimation, for the expiation of his guilt, unto the priest; and the priest shall reconcile him from his error which he committed in ignorance, and he shall have forgiveness. read more.
It is for his guilt; he is certainly guilty against the LORD.