'Rocks' in the Bible

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.

To enter into cavities of the rocks, And into clefts of the high places, Because of the fear of Jehovah, And because of the honour of His excellency, In His rising to terrify the earth.

And they have come, and rested all of them in the desolate valleys, And in holes of the rocks, and on all the thorns, And on all the commendable things.

Who are inflamed among oaks, under every green tree, Slaughtering the children in valleys, Under clefts of the rocks.