Verse 15

وَدَخَلَ ٱلْمَدِينَةَ عَلَىٰ حِينِ غَفْلَةٍ مِّنْ أَهْلِهَا فَوَجَدَ فِيهَا رَجُلَيْنِ يَقْتَتِلَانِ هَـٰذَا مِن شِيعَتِهِۦ وَهَـٰذَا مِنْ عَدُوِّهِۦ فَٱسْتَغَـٰثَهُ ٱلَّذِى مِن شِيعَتِهِۦ عَلَى ٱلَّذِى مِنْ عَدُوِّهِۦ فَوَكَزَهُۥ مُوسَىٰ فَقَضَىٰ عَلَيْهِ قَالَ هَـٰذَا مِنْ عَمَلِ ٱلشَّيْطَـٰنِ إِنَّهُۥ عَدُوٌّ مُّضِلٌّ مُّبِينٌ

And he entered the city, unbeknown to its inhabitants and found therein two men fighting, one from his people and the other one from his enemies. He then tried to help the one from his people against the one who was his enemy; Moses therefore punched him and killed him. He said; this is the deed of Satan, indeed he is a misleading, manifest enemy.