أَفَأَمِنُوا أَن تَأْتِيَهُمْ غَاشِيَةٌ مِّنْ عَذَابِ اللَّهِ أَوْ تَأْتِيَهُمُ السَّاعَةُ بَغْتَةً وَهُمْ لَا يَشْعُرُونَ

Do they feel secure from being overtaken by a blanket punishment from Allah, or being overtaken by the Hour, suddenly, while they are unaware?