يَا أَيُّهَا الَّذِينَ آمَنُوا لَا يَسْخَرْ قَومٌ مِّن قَوْمٍ عَسَى أَن يَكُونُوا خَيْرًا مِّنْهُمْ وَلَا نِسَاء مِّن نِّسَاء عَسَى أَن يَكُنَّ خَيْرًا مِّنْهُنَّ وَلَا تَلْمِزُوا أَنفُسَكُمْ وَلَا تَنَابَزُوا بِالْأَلْقَابِ بِئْسَ الاِسْمُ الْفُسُوقُ بَعْدَ الْإِيمَانِ وَمَن لَّمْ يَتُبْ فَأُوْلَئِكَ هُمُ الظَّالِمُونَ
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سورة الحُـجُـرات
(49/11) O you who believe (who are âmenû)! Let not one people mock at (another) people. May be they (the mocked) are better than the others, and nor women (mock) at other women, may be they (the others) are better than themselves. And do not defame one another, nor call one another by nicknames. Evil is transgressed names after the Faith, and whoever does not repent, then such are indeed the wrong-doers.
Surah Al-Hujurat