Leviticus 4:13-14

4:13 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; 4:14 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.