This verse was revealed about us, the Banu Salimah: "Nor call each other by (offensive) nicknames: ill-seeming is a name connoting wickedness (to be used of one) after he has believed." He said: When the apostle of Allah ﷺ came to us, every one of us had two or three names. The Messenger of Allah ﷺ began to say: O so and so! But they would say: Keep silence, Messenger of Allah! He becomes angry by this name. So this verse was revealed: "Nor call each other by (offensive) nicknames."  

فِينَا نَزَلَتْ هَذِهِ الآيَةُ فِي بَنِي سَلِمَةَ { وَلاَ تَنَابَزُوا بِالأَلْقَابِ بِئْسَ الاِسْمُ الْفُسُوقُ بَعْدَ الإِيمَانِ } قَالَ قَدِمَ عَلَيْنَا رَسُولُ اللَّهِ ﷺ وَلَيْسَ مِنَّا رَجُلٌ إِلاَّ وَلَهُ اسْمَانِ أَوْ ثَلاَثَةٌ فَجَعَلَ النَّبِيُّ ﷺ يَقُولُ يَا فُلاَنُ فَيَقُولُونَ مَهْ يَا رَسُولَ اللَّهِ إِنَّهُ يَغْضَبُ مِنْ هَذَا الاِسْمِ فَأُنْزِلَتْ هَذِهِ الآيَةُ { وَلاَ تَنَابَزُوا بِالأَلْقَابِ }  

"(Allah's saying) "Nor insult one another by nicknames(Surah Al Hujarat 49:11)" was revealed concerning us, the Ansar. When the Prophet ﷺ came to us, a man among us would have two or three names, and the Prophet ﷺ might call him by one of those names, only to be told: "O Messenger of Allah ﷺ, he does not like that name." Then:"Nor insult one another by nicknames." was revealed."  

فِينَا نَزَلَتْ مَعْشَرَ الأَنْصَارِ {وَلاَ تَنَابَزُوا بِالأَلْقَابِ) قَدِمَ عَلَيْنَا النَّبِيُّ ﷺ وَالرَّجُلُ مِنَّا لَهُ الاِسْمَانِ وَالثَّلاَثَةُ فَكَانَ النَّبِيُّ ﷺ رُبَّمَا دَعَاهُمْ بِبَعْضِ تِلْكَ الأَسْمَاءِ فَيُقَالُ يَا رَسُولَ اللَّهِ إِنَّهُ يَغْضَبُ مِنْ هَذَا فَنَزَلَتْ {وَلاَ تَنَابَزُوا بِالأَلْقَابِ}  

[Machine] In Bani Salimah, the verse "Do not insult one another by using offensive nicknames" [Al-Hujurat 11] was revealed. It is said that when the Messenger of Allah ﷺ arrived in Medina, every man among them had two or three names. So, whenever he called someone by one of those names, they would say, "O Messenger of Allah, he dislikes being called by this name." He ﷺ said, "The verse 'Do not insult one another by using offensive nicknames' was then revealed."  

فِينَا نَزَلَتْ فِي بَنِي سَلِمَةَ {وَلَا تَنَابَزُوا بِالْأَلْقَابِ} [الحجرات 11] قَالَ قَدِمَ رَسُولُ اللهِ ﷺ الْمَدِينَةَ وَلَيْسَ مِنَّا رَجُلٌ إِلَّا وَلَهُ اسْمَانِ أَوْ ثَلَاثَةٌ فَكَانَ إِذَا دَعَا أَحَدًا مِنْهُمْ بِاسْمٍ مِنْ تِلْكَ الْأَسْمَاءِ قَالُوا يَا رَسُولَ اللهِ إِنَّهُ يَغْضَبُ مِنْ هَذَا قَالَ فَنَزَلَتْ {وَلَا تَنَابَزُوا بِالْأَلْقَابِ}