The Coalition - 33:15
They had promised Allah before that they would not turn their backs and flee. Every promise made to Allah will be questioned.
The punishment of those who flee in battle:
The Spoils of War/8:16
Whoever on that Day turns his back and runs away except as a tactic of war or to join another unit, has incurred the wrath of Allah and his abode is Hell. What an evil abode.
وَمَنْ يُوَلِّهِمْ يَوْمَئِذٍ دُبُرَهُٓ اِلَّا مُتَحَرِّفاً لِقِتَالٍ اَوْ مُتَحَيِّزاً اِلٰى فِئَةٍ فَقَدْ بَٓاءَ بِغَضَبٍ مِنَ اللّٰهِ وَمَأْوٰيهُ جَهَنَّمُۜ وَبِئْسَ الْمَص۪يرُ