وَكَذَلِكَ فَتَنَّا بَعْضَهُم بِبَعْضٍ لِّيَقُولواْ أَهَؤُلاء مَنَّ اللّهُ عَلَيْهِم مِّن بَيْنِنَا أَلَيْسَ اللّهُ بِأَعْلَمَ بِالشَّاكِرِينَ
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سورة الأنعام
(6/53) And Thus We have tried some of them by means of others, that they might say: are those they whom God hath favoured amongst us? Is not Allah the Best Knower of the thankful?
Surah Al-An'am