18فَهَل يَنظُرونَ إِلَّا السّاعَةَ أَن تَأتِيَهُم بَغتَةً ۖ فَقَد جاءَ أَشراطُها ۚ فَأَنّىٰ لَهُم إِذا جاءَتهُم ذِكراهُمN. J. DawoodAre they waiting for the Hour of Doom to overtake them unawares? Its portents have already come. How else will they be warned when it does overtake them?