Surat Al-'Isrā' - سورة الإسراء

وَأَنَّ الَّذِينَ لَا يُؤْمِنُونَ بِالْآخِرَةِ أَعْتَدْنَا لَهُمْ عَذَابًا أَلِيمًا

Muhsin Khan: And that those who believe not in the Hereafter (i.e. they disbelieve that they will be recompensed for what they did in this world, good or bad, etc.), for them We have prepared a painful torment (Hell).