Judges 6:2
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.
Nave's Topical Index—AKJV

1 Samuel 23:29
And David went up from there, and dwelled in strong holds at Engedi.
Nave's Topical Index—AKJV

Isaiah 33:16
He shall dwell on high: his place of defense shall be the munitions of rocks: bread shall be given him; his waters shall be sure.
Nave's Topical Index—AKJV