And if the whole congregation of Israel sin through ignorance, and the thing be hid from the eyes of the assembly, and they have done somewhat against any of the commandments of the Lord concerning things which should not be done, and are guilty;
When the sin, which they have sinned against it, is known, then the congregation shall offer a young bullock for the sin, and bring him before the tabernacle of the congregation.
And the elders of the congregation shall lay their hands upon the head of the bullock before the Lord: and the bullock shall be killed before the Lord.
And the priest that is anointed shall bring of the bullock's blood to the tabernacle of the congregation:
And the priest shall dip his finger in some of the blood, and sprinkle it seven times before the Lord, even before the vail.
And he shall put some of the blood upon the horns of the altar which is before the Lord, that is in the tabernacle of the congregation, and shall pour out all the blood at the bottom of the altar of the burnt offering, which is at the door of the tabernacle of the congregation.
And he shall take all his fat from him, and burn it upon the altar.
And he shall do with the bullock as he did with the bullock for a sin offering, so shall he do with this: and the priest shall make an atonement for them, and it shall be forgiven them.
And he shall carry forth the bullock without the camp, and burn him as he burned the first bullock: it is a sin offering for the congregation. Leviticus 4:13-21
Then it shall be, if ought be committed by ignorance without the knowledge of the congregation, that all the congregation shall offer one young bullock for a burnt offering, for a sweet savour unto the Lord, with his meat offering, and his drink offering, according to the manner, and one kid of the goats for a sin offering.
And the priest shall make an atonement for all the congregation of the children of Israel, and it shall be forgiven them; for it is ignorance: and they shall bring their offering, a sacrifice made by fire unto the Lord, and their sin offering before the Lord, for their ignorance:
And it shall be forgiven all the congregation of the children of Israel, and the stranger that sojourneth among them; seeing all the people were in ignorance. Numbers 15:24-26