Quran 3:104 — The Amramites (Ali-'Imran)

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

[3:103] You shall hold fast to the rope of GOD, all of you, and do not be divided. Recall GOD's blessings upon you—you used to be enemies and He reconciled your hearts. By His grace, you became brethren. You were at the brink of a pit of fire, and He saved you therefrom. GOD thus explains His revelations for you, that you may be guided.

[3:105] 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.