'Walls of Jerusalem' in the Bible

So I went forth through the valley-gate by night, even unto the front of the snake-fountain, and into the dung-gate, - and I viewed the walls of Jerusalem, how, they, were broken down, and, the gates thereof, consumed with fire.

But it came to pass, when Sanballat and Tobiah and the Arabians and the Ammonites and the Ashdodites heard that the repair of the walls of Jerusalem had gone up, that the breaches began to be stopped, that it angered them exceedingly;