Leviticus 9:2

³if the anointed priest sins so as to bring guilt on the people, then let him offer for his sin which he has sinned a young bull without defect to the LORD for a sin offering.

¹“This is the thing that you shall do to them to make them holy, to minister to me in the priest’s office: take one young bull and two rams without defect,

²¹For him who knew no sin he made to be sin on our behalf, so that in him we might become the righteousness of God.

¹⁸He presented the ram of the burnt offering. Aaron and his sons laid their hands on the head of the ram.

¹⁰by which will we have been sanctified through the offering of the body of Jesus Christ once for all.

¹¹Every priest indeed stands day by day serving and offering often the same sacrifices, which can never take away sins, ¹²but he, when he had offered one sacrifice for sins forever, sat down on the right hand of God, ¹³from that time waiting until his enemies are made the footstool of his feet. ¹⁴For by one offering he has perfected forever those who are being sanctified.

¹⁴He brought the bull of the sin offering, and Aaron and his sons laid their hands on the head of the bull of the sin offering.

²⁷who doesn’t need, like those high priests, to offer up sacrifices daily, first for his own sins, and then for the sins of the people. For he did this once for all, when he offered up himself.

⁷Moses said to Aaron, “Draw near to the altar, and offer your sin offering, and your burnt offering, and make atonement for yourself, and for the people; and offer the offering of the people, and make atonement for them, as the LORD commanded.”

⁸So Aaron came near to the altar, and killed the calf of the sin offering, which was for himself.

³Because of this, he must offer sacrifices for sins for the people, as well as for himself.