Quran 3:105 — The Amramites (Ali-'Imran)

Do not be like those who became divided and disputed, despite the clear proofs that were given to them. For these have incurred a terrible retribution.

[3:104] Let there be a community of you who invite to what is good, advocate righteousness, and forbid evil. These are the winners.

[3:106] The day will come when some faces will be brightened (with joy), while other faces will be darkened (with misery). As for those whose faces are darkened, they will be asked, "Did you not disbelieve after believing? Therefore, suffer the retribution for your disbelief."