Quran

 3:13

قَدْ كَانَ لَكُمْ آيَةٌ فِي فِئَتَيْنِ الْتَقَتَا ۖ فِئَةٌ تُقَاتِلُ فِي سَبِيلِ اللَّهِ وَأُخْرَىٰ كَافِرَةٌ يَرَوْنَهُمْ مِثْلَيْهِمْ رَأْيَ الْعَيْنِ ۚ وَاللَّهُ يُؤَيِّدُ بِنَصْرِهِ مَنْ يَشَاءُ ۗ إِنَّ فِي ذَٰلِكَ لَعِبْرَةً لِأُولِي الْأَبْصَارِ ﴿١٣﴾

13. There was a sign for you in the two parties that met. One party fighting in Allah’s way, and the other disbelieving. They saw them twice as many, with their own eyes. But Allah supports with His help whomever He wills. There is a lesson in this for those who have insight.