Quran 8:45 — The Spoils of War (Al-Anfal)

O you who believe, when you encounter an army, you shall hold fast and commemorate GOD frequently, that you may succeed.

[8:44] And when the time came and you faced them, He made them appear fewer in your eyes, and made you appear fewer in their eyes as well. For GOD willed to carry out a certain plan. All decisions are made by GOD.

[8:46] You shall obey GOD and His messenger, and do not dispute among yourselves, lest you fail and scatter your strength. You shall steadfastly persevere. GOD is with those who steadfastly persevere.