'Walls' in the Bible

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

Day and night they walk around on its walls, while wickedness and destruction are within it.

Why did you break down its walls, so that all who pass by pluck its fruit?

As for the singers, as well as the pipers -- all of them sing within your walls.

You have broken down all his walls; you have made his strongholds a heap of ruins.

Our cattle will be weighted down with produce. No one will break through our walls, no one will be taken captive, and there will be no terrified cries in our city squares.