Quran 8:72 — The Spoils of War (Al-Anfal)

Surely, those who believed, and emigrated, and strove with their money and their lives in the cause of GOD, as well as those who hosted them and gave them refuge, and supported them, they are allies of one another. As for those who believe, but do not emigrate with you, you do not owe them any support, until they do emigrate. However, if they need your help, as brethren in faith, you shall help them, except against people with whom you have signed a peace treaty. GOD is Seer of everything you do.

[8:71] And if they want to betray you, they have already betrayed GOD. This is why He made them the losers. GOD is Omniscient, Most Wise.

[8:73] Those who disbelieved are allies of one another. Unless you keep these commandments, there will be chaos on earth, and terrible corruption.