Sahih al-Bukhari 2156
صحيح البخاري#2156Sahihحَدَّثَنَا حَسَّانُ بْنُ أَبِي عَبَّادٍ، حَدَّثَنَا هَمَّامٌ، قَالَ سَمِعْتُ نَافِعًا، يُحَدِّثُ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما أَنَّ عَائِشَةَ ـ رضى الله عنها ـ سَاوَمَتْ بَرِيرَةَ فَخَرَجَ إِلَى الصَّلاَةِ، فَلَمَّا جَاءَ قَالَتْ إِنَّهُمْ أَبَوْا أَنْ يَبِيعُوهَا، إِلاَّ أَنْ يَشْتَرِطُوا الْوَلاَءَ. فَقَالَ النَّبِيُّ صلى الله عليه وسلم " إِنَّمَا الْوَلاَءُ لِمَنْ أَعْتَقَ ". قُلْتُ لِنَافِعٍ حُرًّا كَانَ زَوْجُهَا أَوْ عَبْدًا فَقَالَ مَا يُدْرِينِي
Narrated `Abdullah bin `Umar:Aisha wanted to buy Barirah and he (the Prophet) went out for the prayer. When he returned, she told him that they (her masters) refused to sell her except on the condition that her Wala' would go to them. The Prophet (ﷺ) replied, 'The Wala' would go to him who manumits.' " Hammam asked Nafi` whether her (Barirah's) husband was a free man or a slave. He replied that he did not know
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 34:107