Inevitability of Allah's Promise

بَلْ تَأْتِيهِم بَغْتَةً فَتَبْهَتُهُمْ فَلَا يَسْتَطِيعُونَ رَدَّهَا وَلَا هُمْ يُنظَرُونَ

Rather, it will come to them unexpectedly and bewilder them, and they will not be able to repel it, nor will they be reprieved.

أَوْ نُرِيَنَّكَ ٱلَّذِى وَعَدْنَـٰهُمْ فَإِنَّا عَلَيْهِم مُّقْتَدِرُونَ

Or whether [or not] We show you that which We have promised them, indeed, We are Perfect in Ability.