Are they waiting except for the Hour to come upon them suddenly while they perceive not?
The Saheeh International Quran Translation
هَلْ يَنظُرُونَ إِلَّا ٱلسَّاعَةَ أَن تَأْتِيَهُم بَغْتَةً وَهُمْ لَا يَشْعُرُونَAre they waiting except for the Hour to come upon them suddenly while they perceive not?