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.