Hebrews 11:38 (of whom the world was not worthy,) wandering in deserts and mountains, and in dens and caverns of the earth. (DBY)
Isaiah 2:19 And 'men' have entered into caverns of rocks, And into caves of dust, Because of the fear of Jehovah, And because of the honour of His excellency, In His rising to terrify the earth. (YLT)
Isaiah 2:21 To go into the caverns of the rocks, and into the clefts of the ragged rocks, from before the terror of Yahweh, and from the glory of his majesty, when he arises to shake the earth mightily. (WEB ASV NAS RSV NIV)