Bible Verses About Fort: Caves used for

And the hand of Midian prevailed against Israel: and because of the Midianites the children of Israel made them the dens which are in the mountains, and caves, and strong holds.

And David went up from thence, and dwelt in strong holds at Engedi.

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.