In the name of Allah, Most Gracious, Most Merciful.
10. The believers are nothing else than brothers. So make reconciliation between your brothers, and fear Allâh, that you may receive mercy.
11. O you who believe! Let not a group scoff at another group, it may be that the latter are better than the former; nor let (some) women scoff at other women, it may be that the latter are better than the former, nor defame one another, nor insult one another by nicknames. How bad is it, to insult one’s brother after having Faith. And whosoever does not repent, then such are indeed Zâlimûn (wrong-doers, etc.).
12. O you who believe! Avoid much suspicions, indeed some suspicions are sins. And spy not, neither backbite one another. Would one of you like to eat the flesh of his dead brother? You would hate it (so hate backbiting) . And fear Allâh. Verily, Allâh is the One Who accepts repentance, Most Merciful.
13. O mankind! We have created you from a male and a female, and made you into nations and tribes, that you may know one another. Verily, the most honourable of you with Allâh is that (believer) who has At-Taqwa [i.e. one of the Muttaqûn (pious – see V.2:2)]. Verily, Allâh is All-Knowing, All-Aware.
Sura 49. Al-Hujuraat (The Dwellings)