Aisha said, "I bought Barira and her masters stipulated that the Wala would be for them." Aisha mentioned that to the Prophet ﷺ and he said, "Manumit her, as the Wala is for the one who gives the silver (i.e. pays the price for freeing the slave)." Aisha added, "So I manumitted her. After that, the Prophet caller her (Barira) and gave her the choice to go back to her husband or not. She said, "If he gave me so much and so much (money) I would not stay with him." So she selected her ownself (i.e. refused to go back to her husband)." (Using translation from Bukhārī 6758)  

اشْتَرَيْتُ بَرِيرَةَ فَاشْتَرَطَ أَهْلُهَا وَلَاءَهَا فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ ﷺ فَقَالَ «أَعْتِقِيهَا فَإِنَّ الْوَلَاءُ لِمَنْ أَعْطَى الْوَرِقَ» قَالَتْ فَأَعْتَقْتُهَا قَالَتْ فَدَعَاهَا النَّبِيُّ ﷺ «فَخَيَّرَهَا مِنْ زَوْجِهَا» قَالَتْ لَوْ أَعْطَانِي كَذَا وَكَذَا مَا أَقَمْتُ عِنْدَهُ فَاخْتَارَتْ نَفْسَهَا وَكَانَ زَوْجُهَا حُرًّا  

"Buy her and set her free, for Al-Wala' is to the one who sets the slave free." Some meat was brought and it was said: "This is some of that which was given in charity to Barirah." He said: "It is charity for her and a gift for us." And the Messenger of Allah gave her the choice, and her husband was a free man. (Using translation from Nasāʾī 3450)  

أَنْ تَشْتَرِيَ بَرِيرَةَ فَاشْتَرَطُوا وَلَاءَهَا فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ ﷺ فَقَالَ «اشْتَرِيهَا فَأَعْتِقِيهَا فَإِنَّ الْوَلَاءَ لِمَنْ أَعْتَقَ» وَأُتِيَ بِلَحْمٍ فَقِيلَ إِنَّ هَذَا مِمَّا تُصُدِّقَ بِهِ عَلَى بَرِيرَةَ فَقَالَ «هُوَ لَهَا صَدَقَةٌ وَلَنَا هَدِيَّةٌ» وَخَيَّرَهَا رَسُولُ اللهِ ﷺ وَكَانَ زَوْجُهَا حُرًّا