Nehemiah 9:2-3 shows outdoor public confession by the Jewish community in Jerusalem in the fifth century B.C., almost a century and a half after the destruction of Jerusalem in 587/6 B.C. and the subsequent exile of Judah. The post-exilic community in Jerusalem had been listening to Ezra and the Levites reading and instructing them from the Book of the Law of Moses (Neh. 8:1-18) and then:
Neh. 9:2-3--"They stood in their places and confessed their sins and the iniquities ("iniquities") of their fathers. They stood where they were and read from the book of the Law of the Lord their God for a quarter of the day, and spent another quarter in confession and in worshiping the Lord their God."
It is clear that the community was confessing specific sins of theirs and their fathers, since they spent a quarter of the day—three hours—doing so.
Source: Dr. Gary S. Greig - The Biblical Foundations of Identificational Repentance as One Prayer Pattern Useful to Advance God's Kingdom and Evangelism, April 2001