Surah Al-Anfal (The Spoils of War), Verse 19

اِنْ تَسْتَفْتِحُوْا فَقَدْ جَآءَكُمُ الْفَتْحُ وَاِنْ تَنْتَهُوْا فَهُوَ خَیْرٌ لَّكُمْ وَاِنْ تَعُوْدُوْا نَعُدْ وَلَنْ تُغْنِیَ عَنْكُمْ فِئَتُكُمْ شَیْـًٔا وَّلَوْ كَثُرَتْ وَاَنَّ اللّٰهَ مَعَ الْمُؤْمِنِیْنَ 

In tastaftihoo faqad jaaa'akumul fathu wa in tantahoo fahuwa khairul lakum wa in ta'oodoo na'ud wa lan tughniya 'ankum fi'atukum shai'anw wa law kasurat wa annal laaha ma'al mu'mineen

“(O Unbelievers!) if ye prayed for victory and judgment, now hath the judgment come to you: if ye desist (from wrong), it will be best for you: if ye return (to the attack), so shall We. Not the least good will your forces be to you even if they were multiplied: for verily Allah is with those who believe!”

Quran 8:19 (Yusuf Ali Translation)