'Walls' in the Bible

Then a breach was made in the city, and all the men of war [fled] by night by the way of the gate between the two walls, which was by the king's garden (now the Chaldeans were against the city around it); and [the king] went by the way of the Arabah.

All the army of the Chaldeans, who were [with] the captain of the guard, broke down the walls around Jerusalem.