Quran 28:15

وَدَخَلَ ٱلۡمَدِينَةَ عَلَىٰ حِينِ غَفۡلَةٍ۬ مِّنۡ أَهۡلِهَا فَوَجَدَ فِيہَا رَجُلَيۡنِ يَقۡتَتِلَانِ هَـٰذَا مِن شِيعَتِهِۦ وَهَـٰذَا مِنۡ عَدُوِّهِۦ‌ۖ فَٱسۡتَغَـٰثَهُ ٱلَّذِى مِن شِيعَتِهِۦ عَلَى ٱلَّذِى مِنۡ عَدُوِّهِۦ فَوَكَزَهُ ۥ مُوسَىٰ فَقَضَىٰ عَلَيۡهِ‌ۖ قَالَ هَـٰذَا مِنۡ عَمَلِ ٱلشَّيۡطَـٰنِ‌ۖ إِنَّهُ ۥ عَدُوٌّ۬ مُّضِلٌّ۬ مُّبِينٌ۬ ١٥

Once he entered the city unexpectedly, without being recognized by the people. He found two men fighting; one was (a Hebrew) from his people, and the other was (an Egyptian) from his enemies. The one from his people called on him for help against his enemy. Moses punched him, killing him. He said, "This is the work of the devil; he is a real enemy, and a profound misleader."