2 Chronicles 29:21

And they brought seven bullocks, and seven rams, and seven lambs, and seven he-goats, the number seven being the sacred number, for a sin offering for the kingdom, for the sins of the king and his predecessors, and for the Sanctuary, for the priests themselves and for the desecration of the Sanctuary, and for Judah, for all the members of the nation who had consented to the introduction of idolatry. And he commanded the priests, the sons of Aaron, to offer them on the altar of the Lord, to make an atonement for all the trespasses and sins as indicated.