وَمَن يُوَلِّهِمْ يَوْمَئِذٍ دُبُرَهُ إِلاَّ مُتَحَرِّفاً لِّقِتَالٍ أَوْ مُتَحَيِّزاً إِلَى فِئَةٍ فَقَدْ بَاء بِغَضَبٍ مِّنَ اللّهِ وَمَأْوَاهُ جَهَنَّمُ وَبِئْسَ الْمَصِيرُ
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سورة الأنفال
(8/16) And whoever turns his back to them on such a day, unless maneuvering for battle or intending to join a company, then he truly has incurred Wrath from Allah and his abode is Hell, and what an evil journey’s end.
Surah Al-Anfal