فَهَل يَنظُرونَ إِلَّا السّاعَةَ أَن تَأتِيَهُم بَغتَةً ۖ فَقَد جاءَ أَشراطُها ۚ فَأَنّىٰ لَهُم إِذا جاءَتهُم ذِكراهُم

Are they waiting for the Hour to come upon them suddenly? Its signs have already appeared. Once it is upon them, what good will their reminder be?