وَدَخَلَ الْمَدِينَةَ عَلَى حِينِ غَفْلَةٍ مِّنْ أَهْلِهَا فَوَجَدَ فِيهَا رَجُلَيْنِ يَقْتَتِلَانِ هَذَا مِن شِيعَتِهِ وَهَذَا مِنْ عَدُوِّهِ فَاسْتَغَاثَهُ الَّذِي مِن شِيعَتِهِ عَلَى الَّذِي مِنْ عَدُوِّهِ فَوَكَزَهُ مُوسَى فَقَضَى عَلَيْهِ قَالَ هَذَا مِنْ عَمَلِ الشَّيْطَانِ إِنَّهُ عَدُوٌّ مُّضِلٌّ مُّبِينٌ
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سورة القصص
(28/15) And he (Moses, before wisdom was given to him) went into the city at a time of inattention by its people (without any one perceived him). He found therein two men fighting, one being of his party and the other of his enemies. Then he who was of his party asked him for help against him who was of his enemies. So Moses struck him with his fist (killed him). So it (death) was fulfilled. Moses said: “This is of the devil s doing. Surely he is an enemy, leaving openly in Misguidance”.
Surah Al-Qasas