Commentaries:
Jamieson, Fausset, and Brown
they fortified Jerusalem unto the broad wall—or, "double wall," extending from the gate of Ephraim to the corner gate, four hundred cubits in length, formerly broken down by Joash, king of Israel [II Chronicles 25:23], but afterwards rebuilt by Uzziah [II Chronicles 26:9], who made it so strong that the Chaldeans, finding it difficult to demolish, had left it standing.
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