وَكَذَلِكَ فَتَنَّا بَعْضَهُم بِبَعْضٍ لِّيَقُولواْ أَهَـؤُلاء مَنَّ اللّهُ عَلَيْهِم مِّن بَيْنِنَا أَلَيْسَ اللّهُ بِأَعْلَمَ بِالشَّاكِرِينَ
            
            And  thus  We  have  tried  some  of  them  through  others  that  the  disbelievers  might  say, "Is  it  these  whom Allah has  favored  among  us?"  Is  not Allah most  knowing  of  those who  are  grateful?