The Book on General Behaviour (Kitab Al-Adab)

Muslim :: Book 25 : Hadith 5336

Zainab, daughter of Umm Salama, reported: My name first was Barra. Allah's Messenger (may peace be upon him) gave me the name of Zainab. Then there entered (into the house of Allah's Prophet as a wife) Zainab, daughter of Jahsh, and her name was also Barra, and he gave her the name of Zainab.

Source materials are from the University of Southern California MSA site
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