وَدَخَلَ الْمَدِيْنَةَ عَلٰى حِيْنِ غَفْلَةٍ مِّنْ اَهْلِهَا فَوَجَدَ فِيْهَا رَجُلَيْنِ يَقْتَتِلٰنِۖ هٰذَا مِنْ شِيْعَتِهٖ وَهٰذَا مِنْ عَدُوِّهٖۚ فَاسْتَغَاثَهُ الَّذِيْ مِنْ شِيْعَتِهٖ عَلَى الَّذِيْ مِنْ عَدُوِّهٖ ۙفَوَكَزَهٗ مُوْسٰى فَقَضٰى عَلَيْهِۖ قَالَ هٰذَا مِنْ عَمَلِ الشَّيْطٰنِۗ اِنَّهٗ عَدُوٌّ مُّضِلٌّ مُّبِيْنٌ ( القصص: ١٥ )
Wa dakhalal madeenata 'alaa heene ghaflatim min ahlihaa fawajada feeha raju laini yaqtatilaani haazaa min shee'atihee wa haaza min 'aduwwihee fastaghaasahul lazee min shee'atihee 'alal lazee min 'aduwwihee fawakazahoo Moosaa faqadaa 'alaihi qaala haaza min 'amalish Shaitaani innahoo 'aduwwum mmudillum mubeen (al-Q̈aṣaṣ 28:15)
Sahih International:
And he entered the city at a time of inattention by its people and found therein two men fighting: one from his faction and one from among his enemy. And the one from his faction called for help to him against the one from his enemy, so Moses struck him and [unintentionally] killed him. [Moses] said, "This is from the work of Satan. Indeed, he is a manifest, misleading enemy." (Al-Qasas [28] : 15)
1 Mufti Taqi Usmani
Once he entered the city at a time when its people were heedless; so he found in it two men fighting each other: This one was from his own group, and that one from his enemies. So the one from his own group called him for help against the one who was from his enemies. So Mūsā gave him a blow with his fist and finished him off. (Then) He (Mūsā) said (out of remorse), “This is some of Satan’s act. He is indeed a clear enemy who misleads (people).”