Abu Hudhaifa bin ʿUtba bin Rabiʿa bin ʿAbdi Shams who had witnessed the battle of Badr along with the Prophet ﷺ adopted Salim as his son, to whom he married his niece, Hind bint Al-Walid bin ʿUtba bin Rabiʿa; and Salim was the freed slave of an Ansar woman, just as the Prophet ﷺ 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 ʿAmr Al-Quraishi Al-ʿAmiri-- and she was the wife of Abu- Hudhaifa bin ʿUtba--came to the Prophet ﷺ and said, "O Messenger of Allah ﷺ! 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.
أَنَّ أَبَا حُذَيْفَةَ بْنَ عُتْبَةَ بْنِ رَبِيعَةَ بْنِ عَبْدِ شَمْسٍ وَكَانَ مِمَّنْ شَهِدَ بَدْرًا مَعَ النَّبِيِّ ﷺ تَبَنَّى سَالِمًا وَأَنْكَحَهُ بِنْتَ أَخِيهِ هِنْدَ بِنْتَ الْوَلِيدِ بْنِ عُتْبَةَ بْنِ رَبِيعَةَ وَهْوَ مَوْلًى لاِمْرَأَةٍ مِنَ الأَنْصَارِ كَمَا تَبَنَّى النَّبِيُّ ﷺ زَيْدًا وَكَانَ مَنْ تَبَنَّى رَجُلاً فِي الْجَاهِلِيَّةِ دَعَاهُ النَّاسُ إِلَيْهِ وَوَرِثَ مِنْ مِيرَاثِهِ حَتَّى أَنْزَلَ اللَّهُ {ادْعُوهُمْ لآبَائِهِمْ} إِلَى قَوْلِهِ {وَمَوَالِيكُمْ} فَرُدُّوا إِلَى آبَائِهِمْ فَمَنْ لَمْ يُعْلَمْ لَهُ أَبٌ كَانَ مَوْلًى وَأَخًا فِي الدِّينِ فَجَاءَتْ سَهْلَةُ بِنْتُ سُهَيْلِ بْنِ عَمْرٍو الْقُرَشِيِّ ثُمَّ الْعَامِرِيِّ وَهْىَ امْرَأَةُ أَبِي حُذَيْفَةَ النَّبِيَّ ﷺ فَقَالَتْ يَا رَسُولَ اللَّهِ إِنَّا كُنَّا نَرَى سَالِمًا وَلَدًا وَقَدْ أَنْزَلَ اللَّهُ فِيهِ مَا قَدْ عَلِمْتَ فَذَكَرَ الْحَدِيثَ