Sura 8 Al-Anfal (The Spoils of War), aya 16

1. وَمَنْ يُوَلِّهِمْ يَوْمَئِذٍ دُبُرَهُ إِلَّا مُتَحَرِّفًا لِقِتَالٍ أَوْ مُتَحَيِّزًا إِلَىٰ فِئَةٍ فَقَدْ بَاءَ بِغَضَبٍ مِنَ اللَّهِ وَمَأْوَاهُ جَهَنَّمُ ۖ وَبِئْسَ الْمَصِيرُ

   And whoever turns his back to them on such a day, unless swerving (as a strategy) for war or joining (another) company, has certainly returned with anger (upon him) from Allah, and his refuge is Hell - and wretched is the destination.

   8:16

Tafsiri: Saheeh International