Sahih al-Bukhari 6717
Sahih al-Bukhari · Book 84: Expiation for Unfulfilled Oaths · If somebody manumits a slave for expiation, for whom will the slave’s Wala be?
Narrated `Aisha:
حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ ، حَدَّثَنَا شُعْبَةُ ، عَنِ الْحَكَمِ ، عَنْ إِبْرَاهِيمَ ، عَنِ الأَسْوَدِ ، عَنْ عَائِشَةَ ، أَنَّهَا أَرَادَتْ أَنْ تَشْتَرِيَ، بَرِيرَةَ فَاشْتَرَطُوا عَلَيْهَا الْوَلاَءَ، فَذَكَرَتْ ذَلِكَ لِلنَّبِيِّ صلى الله عليه وسلم فَقَالَ " اشْتَرِيهَا إِنَّمَا الْوَلاَءُ لِمَنْ أَعْتَقَ " .
that she intended to buy Barira (a slave girl) and her masters stipulated that they would have her Wala'. When `Aisha mentioned that to the Prophet (ﷺ) ; he said, "Buy her, for the Wala' is for the one who manumits."