Al-Anfal 8:66

ٱلۡـَٰٔنَ خَفَّفَ ٱللَّهُ عَنكُمۡ وَعَلِمَ أَنَّ فِيكُمۡ ضَعۡفٗاۚ فَإِن يَكُن مِّنكُم مِّاْئَةٞ صَابِرَةٞ يَغۡلِبُواْ مِاْئَتَيۡنِۚ وَإِن يَكُن مِّنكُمۡ أَلۡفٞ يَغۡلِبُوٓاْ أَلۡفَيۡنِ بِإِذۡنِ ٱللَّهِۗ وَٱللَّهُ مَعَ ٱلصَّـٰبِرِينَ 66

Now, Allah has lightened [the hardship] for you, and He knows that among you is weakness. So if there are from you one hundred [who are] steadfast, they will overcome two hundred. And if there are among you a thousand, they will overcome two thousand by permission of Allah. And Allah is with the steadfast