Surah Aali Imran (The Family of Imran), Verse 13

قَدْ كَانَ لَكُمْ اٰیَةٌ فِیْ فِئَتَیْنِ الْتَقَتَا فِئَةٌ تُقَاتِلُ فِیْ سَبِیْلِ اللّٰهِ وَاُخْرٰی كَافِرَةٌ یَّرَوْنَهُمْ مِّثْلَیْهِمْ رَاْیَ الْعَیْنِ وَاللّٰهُ یُؤَیِّدُ بِنَصْرِهٖ مَنْ یَّشَآءُ اِنَّ فِیْ ذٰلِكَ لَعِبْرَةً لِّاُولِی الْاَبْصَارِ ۟

Qad kaana lakum Aayatun fee fi'atainil taqataa fi'atun tuqaatilu fee sabeelil laahi wa ukhraa kaafiratuny yarawnahum mislaihim ra' yal 'ayn; wallaahu yu'ayyidu bi nasrihee mai yashaaa'; innaa fee zaalika la 'ibratal li ulil absaar

“"There has already been for you a Sign in the two armies that met (in combat): One was fighting in the cause of Allah, the other resisting Allah; these saw with their own eyes Twice their number. But Allah doth support with His aid whom He pleaseth. In this is a warning for such as have eyes to see."”

Quran 3:13 (Yusuf Ali Translation)