'Four' in the Bible

Now there were four leprous men at the entrance of the gate: and they said one to another, Why sit we here until we die?

And 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 brake down the wall of Jerusalem from the gate of Ephraim unto the corner gate, four hundred cubits.