Sahih Muslim 1505
Sahih Muslim · Book 20: The Book of Emancipating Slaves · Al-Wala' (Right of inheritance) belongs to the one who manumits the slave
Abu Huraira (Allah be pleased with him) reported:
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ، حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ ، عَنْ سُلَيْمَانَ بْنِ بِلاَلٍ ، حَدَّثَنِي سُهَيْلُ بْنُ أَبِي صَالِحٍ ، عَنْ أَبِيهِ ، عَنْ أَبِي هُرَيْرَةَ ، قَالَ أَرَادَتْ عَائِشَةُ أَنْ تَشْتَرِيَ، جَارِيَةً تُعْتِقُهَا فَأَبَى أَهْلُهَا إِلاَّ أَنْ يَكُونَ لَهُمُ الْوَلاَءُ فَذَكَرَتْ ذَلِكَ لِرَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ " لاَ يَمْنَعُكِ ذَلِكِ فَإِنَّمَا الْوَلاَءُ لِمَنْ أَعْتَقَ " .
'A'isha (Allah be pleated with her) thought of buying a slave-girl and emancipating her, but her owners refused to (sell her but on the condition) that the right of inheritance would vest in them. She made a mention of that to Allah's Messenger (ﷺ). whereupon he said: Let this (condition) not stand in your way for the right of inheritance vests with one who emancipates.