Leviticus 4:3

if the priest that is anointed do sin according to the sin of the people, the reference here very probably being to the high priest, who was in a special sense the anointed of the Lord among the priests; if this high priest in his official capacity, as the representative of the people, should become guilty of such an unintentional sin, then let him bring for his sin which he hath sinned a young bullock without blemish unto the Lord for a sin-offering, the most conspicuous sacrificial animal because of the priest's high position.