"I bought Barirah and her masters stipulated that her loyalty (Wala) should be to them, I mentioned that to the Prophet and he said: 'Set her free, and loyalty belongs to the one who pays the silver.''' She said: "so I set her free. The Messenger of Allah called her and gave her the choice regarding her husband, and she chose herself. Her husband was a free man." (Using translation from Nasāʾī 4642)
اشْتَرَيْتُ بَرِيرَةَ فَاشْتَرَطَ أَهْلُهَا وَلَاءَهَا فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ ﷺ فَقَالَ «أَعْتِقِيهَا فَإِنَّ الْوَلَاءَ لِمَنْ أَعْطَى الْوَرِقَ» قَالَتْ فَعَتَقْتُهَا