An-Nur 24:40 او كظلمات في بحر لجي يغشاه موج من فوقه موج من فوقه سحاب ظلمات بعضها فوق بعض اذا اخرج يده لم يكد يراها ومن لم يجعل الله له نورا فما له من نور ٤٠

Or (their deeds) are like layers of darkness in a vast deep sea overwhelmed by a wave, above which there is another wave, above which there are clouds - layers of darkness, one above the other. When one puts forth his hand, he can hardly see it; and the one to whom Allah does not give light can have no light at all.