'Caves' in the Bible

Men will go into caves of the rocksAnd into holes of the groundBefore the terror of the LordAnd the splendor of His majesty,When He arises to make the earth tremble.

Because the palace has been abandoned, the populated city forsaken.Hill and watch-tower have become caves forever,A delight for wild donkeys, a pasture for flocks;

But this is a people plundered and despoiled;All of them are trapped in caves,Or are hidden away in prisons;They have become a prey with none to deliver them,And a spoil, with none to say, “Give them back!”