'Defence' in the Bible

And the LORD will create upon every dwelling place of mount Zion, and upon her assemblies, a cloud and smoke by day, and the shining of a flaming fire by night: for upon all the glory shall be a defence.

And they shall turn the rivers far away; and the brooks of defence shall be emptied and dried up: the reeds and flags shall wither.

He shall dwell on high: his place of defence shall be the munitions of rocks: bread shall be given him; his waters shall be sure.