Quran 8:66 — The Spoils of War (Al-Anfal)

الـٰٔنَ خَفَّفَ اللَّهُ عَنكُم وَعَلِمَ أَنَّ فيكُم ضَعفًا ۚ فَإِن يَكُن مِنكُم مِا۟ئَةٌ صابِرَةٌ يَغلِبوا مِا۟ئَتَينِ ۚ وَإِن يَكُن مِنكُم أَلفٌ يَغلِبوا أَلفَينِ بِإِذنِ اللَّهِ ۗ وَاللَّهُ مَعَ الصّٰبِرينَ

Now (that many new people have joined you) GOD has made it easier for you, for He knows that you are not as strong as you used to be. Henceforth, a hundred steadfast believers can defeat two hundred, and a thousand of you can defeat two thousand by GOD's leave. GOD is with those who steadfastly persevere.

[8:65] O you prophet, you shall exhort the believers to fight. If there are twenty of you who are steadfast, they can defeat two hundred, and a hundred of you can defeat a thousand of those who disbelieved. That is because they are people who do not understand.

[8:67] No prophet shall acquire captives, unless he participates in the fighting. You people are seeking the materials of this world, while GOD advocates the Hereafter. GOD is Almighty, Most Wise.