Quran 8:47 — The Spoils of War (Al-Anfal)

Do not be like those who left their homes grudgingly, only to show off, and in fact discouraged others from following the path of GOD. GOD is fully aware of everything they do.

[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.

[8:48] The devil had adorned their works in their eyes, and said, "You cannot be defeated by any people today," and "I will be fighting along with you." But as soon as the two armies faced each other, he turned back on his heels and fled, saying, "I disown you. I see what you do not see. I am afraid of GOD. GOD's retribution is awesome."