Sahih al-Bukhari 6192

Arabic

حَدَّثَنَا صَدَقَةُ بْنُ الْفَضْلِ، أَخْبَرَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، عَنْ شُعْبَةَ، عَنْ عَطَاءِ بْنِ أَبِي مَيْمُونَةَ، عَنْ أَبِي رَافِعٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ زَيْنَبَ، كَانَ اسْمُهَا بَرَّةَ، فَقِيلَ تُزَكِّي نَفْسَهَا‏.‏ فَسَمَّاهَا رَسُولُ اللَّهِ صلى الله عليه وسلم زَيْنَبَ‏.‏

English translation

Narrated Abu Huraira:Zainab's original name was "Barrah," but it was said' "By that she is giving herself the prestige of piety." So the Prophet (ﷺ) changed her name to Zainab

Reference: Sahih al-Bukhari 6192, Book of Good Manners and Form (Al-Adab). English translation by Dr. Muhammad Muhsin Khan.