Al-Aswad narrates from Sayyidah Aishah (may Allah be pleased with her) that Sayyidah Aishah (may Allah be pleased with her) bought Barirah, and her family stipulated the wala' for themselves. Sayyidah Aishah (may Allah be pleased with her) said to the Messenger of Allah (peace and blessings be upon him): I want to buy Barirah and set her free, and her owners are stipulating the wala'. He (peace and blessings be upon him) said: "Set her free, for the wala' belongs to the one who sets free, or to the one who pays the price." He said: Sayyidah Aishah (may Allah be pleased with her) bought her and set her free. The narrator said: Barirah was given the choice, and she chose herself (separation). Barirah said: Even if I were given such and such, I would still not stay with him. Al-Aswad said: Her husband was free.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14275