﴿ بَلْ تَأْتِيهِم بَغْتَةًۭ فَتَبْهَتُهُمْ فَلَا يَسْتَطِيعُونَ رَدَّهَا وَلَا هُمْ يُنظَرُونَ ﴾

“Nay, but [the Last Hour] will come upon them of a sudden, and will stupefy them: and they will be unable to avert it, and neither wilt they be allowed any respite.”

(Nay, but it) the Last Hour (will come upon them unawares) suddenly (so that it will stupefy them) so it will take them by surprise, (and they will be unable to repel it) from themselves, (neither will they be reprieved) nor will their chastisement be postponed.