سورة As-Saaffaat 37:177

فَإِذَا نَزَلَ بِسَاحَتِهِمْ فَسَآءَ صَبَاحُ ٱلْمُنذَرِينَ ١٧٧

Yet when it descends upon them: how evil will that morning be for those who had been warned