Al-Fath 48:22

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.

Had the disbelievers fought you, they would have certainly turned their backs, then they would have found neither a supporter nor a helper-