'Walls of Jerusalem' in the Bible

I proceeded through the Valley Gate by night, in the direction of the Well of the Dragons and the Dung Gate, inspecting the walls of Jerusalem that had been breached and its gates that had been destroyed by fire.

When Sanballat, Tobiah, the Arabs, the Ammonites, and the people of Ashdod heard that the restoration of the walls of Jerusalem had moved ahead and that the breaches had begun to be closed, they were very angry.

Because you favor Zion, do what is good for her! Fortify the walls of Jerusalem!