Regret and Remorse on the Day of Reckoning

فَلَمَّا رَأَوْهُ زُلْفَةً سِيٓـَٔتْ وُجُوهُ ٱلَّذِينَ كَفَرُوا۟ وَقِيلَ هَـٰذَا ٱلَّذِى كُنتُم بِهِۦ تَدَّعُونَ

But when they see it approaching, the faces of those who disbelieve will be distressed, and it will be said, "This is that for which you used to call."