يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا يَسۡخَرۡ قَوۡمٞ مِّن قَوۡمٍ عَسَىٰٓ أَن يَكُونُواْ خَيۡرٗا مِّنۡهُمۡ وَلَا نِسَآءٞ مِّن نِّسَآءٍ عَسَىٰٓ أَن يَكُنَّ خَيۡرٗا مِّنۡهُنَّۖ وَلَا تَلۡمِزُوٓاْ أَنفُسَكُمۡ وَلَا تَنَابَزُواْ بِٱلۡأَلۡقَٰبِۖ بِئۡسَ ٱلِٱسۡمُ ٱلۡفُسُوقُ بَعۡدَ ٱلۡإِيمَٰنِۚ وَمَن لَّمۡ يَتُبۡ فَأُوْلَٰٓئِكَ هُمُ ٱلظَّٰلِمُونَ

Yaaa ayyuhal lazeena aamanoo laa yaskhar qawmum min qawmin 'asaaa anyyakoonoo khairam minhum wa laa nisaaa'um min nisaaa'in 'Asaaa ay yakunna khairam minhunna wa laa talmizooo anfusakum wa laa tanaabazoo bil alqaab; bi'sal ismul fusooqu ba'dal eemaan; wa mal-lam yatub fa-ulaaa'ika humuz zaalimoon

O ye who believe! Let not some men among you laugh at others: It may be that the (latter) are better than the (former): Nor let some women laugh at others: It may be that the (latter) are better than the (former): Nor defame nor be sarcastic to each other, nor call each other by (offensive) nicknames: Ill-seeming is a name connoting wickedness, (to be used of one) after he has believed: And those who do not desist are (indeed) doing wrong.

— Al-Hujurat (ٱلحُجُرَات), 49:11