Quran 33:15 — The Parties (Al-Ahzab)

They had pledged to GOD in the past that they would not turn around and flee; making a pledge with GOD involves a great responsibility.

[33:14] Had the enemy invaded and asked them to join, they would have joined the enemy without hesitation.

[33:16] Say, "If you flee, you can never flee from death or from being killed. No matter what happens, you only live a short while longer."