وَمَنْ يُّوَلِّهِمْ يَوْمَىِٕذٍ دُبُرَهٗٓ اِلَّا مُتَحَرِّفًا لِّقِتَالٍ اَوْ مُتَحَيِّزًا اِلٰى فِئَةٍ فَقَدْ بَاۤءَ بِغَضَبٍ مِّنَ اللّٰهِ وَمَأْوٰىهُ جَهَنَّمُ ۗ وَبِئْسَ الْمَصِيْرُ ( الأنفال: ١٦ )
Wa mai yuwallihim yawma'izin duburahooo illaa mutaharrifal liqitaalin aw mutahaiyizan ilaa fi'atin faqad baaa'a bighadabim minal laahi wa maawaahu Jahannamu wa bi'sal maseer (al-ʾAnfāl 8:16)
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. (Al-Anfal  : 16)
1 Mufti Taqi Usmani
Whoever turns his back to them on such a day,- unless it is for a tactic in the battle, or to join a company,-turns with wrath from Allah, and his abode is Jahannam (Hell), and it is an evil place to return.