Nehemiah 9:1-3

On the twenty-fourth day of the seventh month, the people of Israel went without eating, and they dressed in sackcloth and threw dirt on their heads to show their sorrow. They refused to let foreigners join them, as they met to confess their sins and the sins of their ancestors. For three hours they stood and listened to the Law of the LORD their God, and then for the next three hours they confessed their sins and worshiped the LORD.