Isaiah 2:21 in the King James Version
To go into the clefts of the rocks, and into the tops of the ragged rocks, for fear of the LORD, and for the glory of his majesty, when he ariseth to shake terribly the earth.
Context
20 In that day, men shall cast away their idols of silver and their idols of gold, which have been made for themselves to worship, to the moles and to the bats,
21 to go into the caverns of the rocks, and into the clefts of the ragged rocks, from before the terror of the LORD, and from the glory of his majesty, when he arises to shake the earth mightily.
22 Stop trusting in man, whose breath is in his nostrils; for of what account is he?