Leviticus 4:1-3

Then the Lord spoke to Moses, saying,

“Speak to the sons of Israel, saying, ‘If a person sins unintentionally in any of the things which the Lord has commanded not to be done, and commits any of them,

if the anointed priest sins so as to bring guilt on the people, then he is to offer to the Lord a bull without defect as a sin offering for his sin which he has committed.