"On the day when the earth and the mountains quake and the mountains become (as) heaps of sand let loose. Surely We have sent to you a Messenger, a witness against you, as We sent a messenger to Pharaoh. But Pharaoh disobeyed the messenger, so We seized him with a violent grip. How, then, if you disbelieve, will you guard yourselves on the day which will make children grey-headed? The heaven being rent asunder thereby. His promise is ever fulfilled. Surely this is a Reminder so let him, who will, take a way to his Lord."