وَلَوْ قَـٰتَلَكُمُ ٱلَّذِينَ كَفَرُوا لَوَلَّوُا ٱلْأَدْبَـٰرَ ثُمَّ لَا يَجِدُونَ وَلِيًّا وَلَا نَصِيرًا

Walaw qatalakumu allatheenakafaroo lawallawoo al-adbara thumma la yajidoonawaliyyan wala naseera

And if those [Makkans] who disbelieve had fought you, they would have turned their backs [in flight]. Then they would not find a protector or a helper.