Ash-Shu'ara' - 26:202

فَيَأْتِيَهُم بَغْتَةً وَهُمْ لَا يَشْعُرُونَ
[26:202]
And it shall come to them all of a sudden, while they shall not perceive;
But the (Penalty) will come to them of a sudden, while they perceive it not;
So that it will come upon them suddenly, when they perceive not.