'Four' in the Bible

Now there were four leprous men at the entrance of the gate. They said one to another, "Why do we sit here until we die?

Jehoash king of Israel took Amaziah king of Judah, the son of Jehoash the son of Ahaziah, at Beth Shemesh, and came to Jerusalem, and broke down the wall of Jerusalem from the gate of Ephraim to the corner gate, four hundred cubits.