إِن تَستَفتِحوا فَقَد جاءَكُمُ الفَتحُ ۖ وَإِن تَنتَهوا فَهُوَ خَيرٌ لَكُم ۖ وَإِن تَعودوا نَعُد وَلَن تُغنِيَ عَنكُم فِئَتُكُم شَيئًا وَلَو كَثُرَت وَأَنَّ اللَّهَ مَعَ المُؤمِنينَ

If you [disbelievers] seek the victory - the defeat has come to you. And if you desist [from hostilities], it is best for you; but if you return [to war], We will return, and never will you be availed by your [large] company at all, even if it should increase; and [that is] because Allah is with the believers.