2 Chronicles 25:23

23Then Joash king of Israel captured Amaziah king of Judah, the son of Joash the son of aJehoahaz, at Beth-shemesh, and brought him to Jerusalem and tore down the wall of Jerusalem from the Gate of Ephraim to the Corner Gate, 400
I.e. One cubit equals approx 18 in.
cubits.
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