Quran 5:54 — The Feast (Al-Ma'edah)

O you who believe, if you revert from your religion, then GOD will substitute in your place people whom He loves and who love Him. They will be kind with the believers, stern with the disbelievers, and will strive in the cause of GOD without fear of any blame. Such is GOD's blessing; He bestows it upon whomever He wills. GOD is Bounteous, Omniscient.

[5:53] The believers will then say, "Are these the same people who swore by GOD solemnly that they were with you?" Their works have been nullified; they are the losers.

[5:55] Your real allies are GOD and His messenger, and the believers who observe the Contact Prayers (Salat), and give the obligatory charity (Zakat), and they bow down.