'Walls of Jerusalem' in the Bible

And I went out by night, through the doorway of the valley, and past the dragon's water-spring as far as the place where waste material was put, viewing the walls of Jerusalem which were broken down, and the doorways which had been burned with fire.

But when it came to the ears of Sanballat and Tobiah and the Arabians and the Ammonites and the Ashdodites, that the building of the walls of Jerusalem was going forward and the broken places were being made good, they were full of wrath;