Narrated `Aisha: Abu Hudhaifa bin `Utba bin Rabi`a bin `Abdi Shams who had witnessed the battle of Badr along with the Prophet adopted Salim as his son, to whom he married his niece, Hind bint Al-Walid bin `Utba bin Rabi`a; and Salim was the freed slave of an Ansar woman, just as the Prophet had adopted Zaid as his son. It was the custom in the Pre-lslamic Period that if somebody adopted a boy, the people would call him the son of the adoptive father and he would be the latter's heir. But when Allah revealed the Divine Verses: 'Call them by (the names of) their fathers . . . your freed-slaves,' (33.5) the adopted persons were called by their fathers' names. The one whose father was not known, would be regarded as a Maula and your brother in religion. Later on Sahla bint Suhail bin `Amr Al-Quraishi Al-`Amiri-- and she was the wife of Abu- Hudhaifa bin `Utba--came to the Prophet and said, O Allah's Apostle! We used to consider Salim as our (adopted) son, and now Allah has revealed what you know (regarding adopted sons). The sub-narrator then mentioned the rest of the narration.