104الَّذينَ ضَلَّ سَعيُهُم فِي الحَياةِ الدُّنيا وَهُم يَحسَبونَ أَنَّهُم يُحسِنونَ صُنعًاTaqi UsmaniThose are the ones whose effort in the worldly life has gone in vain, while they think they are doing well.