وَمَا جَعَلْنَا أَصْحَابَ النَّارِ إِلَّا مَلَائِكَةً وَمَا جَعَلْنَا عِدَّتَهُمْ إِلَّا فِتْنَةً لِّلَّذِينَ كَفَرُوا لِيَسْتَيْقِنَ الَّذِينَ أُوتُوا الْكِتَابَ وَيَزْدَادَ الَّذِينَ آمَنُوا إِيمَانًا وَلَا يَرْتَابَ الَّذِينَ أُوتُوا الْكِتَابَ وَالْمُؤْمِنُونَ وَلِيَقُولَ الَّذِينَ فِي قُلُوبِهِم مَّرَضٌ وَالْكَافِرُونَ مَاذَا أَرَادَ اللَّهُ بِهَذَا مَثَلًا كَذَلِكَ يُضِلُّ اللَّهُ مَن يَشَاء وَيَهْدِي مَن يَشَاء وَمَا يَعْلَمُ جُنُودَ رَبِّكَ إِلَّا هُوَ وَمَا هِيَ إِلَّا ذِكْرَى لِلْبَشَرِ
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سورة الـمّـدّثّـر
(74/31) And We have not made the people (wardens) of the Fire but angels. And We have not made their number but as a mischief for those who disbelieve, that those who have been given the Book may be the owners of certainty and those who believe (who are âmenû) may increase in Faith. And those who have been given the Book and the believers may not fall into suspicion. And that those in whose hearts is a disease (suspicion) and the disbelievers may say: “What does Allah mean by this matter (what is Allah trying to say)”? This is how Allah leaves in Misguidance whom He wills and delivers to Hidayet whom He wills. And none knows the armies of your Lord but He Himself. And that is nothing else than Dhikr (Remembrance) for the mankind.
Surah Al-Muddaththir