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.
1 Samuel 23:29And David went up from thence, and dwelt in strong holds at Engedi.
Isaiah 33:16He shall dwell on high: his place of defence shall be the munitions of rocks: bread shall be given him; his waters shall be sure.