سُورَةُ الشُّعَرَاءِ
Ash-Shu'araa·26:189
فَكَذَّبُوهُ فَأَخَذَهُمْ عَذَابُ يَوْمِ الظُّلَّةِ ۚ إِنَّهُ كَانَ عَذَابَ يَوْمٍ عَظِيمٍ١٨٩
But they gave him the lie. And thereupon suffering overtook them on a day dark with shadows: and, verily, it was the suffering of an awesome day!