'Crevices' in the Bible

My dove, in the clefts of the rock,in the crevices of the cliff,let me see your face,let me hear your voice;for your voice is sweet,and your face is lovely.

They will go into the caves of the rocksand the crevices in the cliffs,away from the terror of the Lordand from His majestic splendor,when He rises to terrify the earth.