Judges   6:2    

...in the mountains, and [caves,] and strong holds.       

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  13:6    

...id hide themselves in [caves,] and in thickets, and ...

When the men of Israel saw that they were in a strait, (for the people were distressed,) then the people did hide themselves in [caves,] and in thickets, and in rocks, and in high places, and in pits.