It was narrated that 'Aishah said:

"Barirah made a contract that she would be freed in return for nine Awaq, one Uqiyyah to be paid each year." She came to 'Aishah asking for help and she said: "No, not unless they agree to accept the sum in one payment, and that the Wala' will go to me." Barirah went and spoke to her masters but they insisted that the Wala' should be for them. She came to 'Aishah and the Messenger of Allah came, and she told her what her masters had said. She said: "No, by Allah, not unless Wala' is to me." The Messenger of Allah said: "What is this?" She said: "O Messenger of Allah, Barirah came to me and asked me to help her with her contract of manumission, and I said no, not unless they agree to accept the sum in one payment, and that the Wala' will be for me. She mentioned that to her masters and they insisted that the Wala' should be for them." The Messenger of Allah said: "Buy her, and stipulate that the Wala' is for the one who sets the slave free." Then he stood up and addressed the people and said: "What is the matter with people who stipulate conditions that are not in the Book of Allah, the Mighty and Sublime? They say: 'I set so-and-so free but the Wala' will be to me.' Every condition that is not in the Book of Allah, the Mighty and Sublime, is a false condition, even if there are a hundred conditions." And the Messenger of Allah gave her the choice with regard to her husband who was still a slave, and she chose herself. 'Urwah said: "If he had been free the Messenger of Allah would not have given her the choice."

أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا جَرِيرٌ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ كَاتَبَتْ بَرِيرَةُ عَلَى نَفْسِهَا بِتِسْعِ أَوَاقٍ فِي كُلِّ سَنَةٍ بِأُوقِيَّةٍ فَأَتَتْ عَائِشَةَ تَسْتَعِينُهَا فَقَالَتْ لاَ إِلاَّ أَنْ يَشَاءُوا أَنْ أَعُدَّهَا لَهُمْ عَدَّةً وَاحِدَةً وَيَكُونُ الْوَلاَءُ لِي . فَذَهَبَتْ بَرِيرَةُ فَكَلَّمَتْ فِي ذَلِكَ أَهْلَهَا فَأَبَوْا عَلَيْهَا إِلاَّ أَنْ يَكُونَ الْوَلاَءُ لَهُمْ فَجَاءَتْ إِلَى عَائِشَةَ وَجَاءَ رَسُولُ اللَّهِ ﷺ عِنْدَ ذَلِكَ فَقَالَتْ لَهَا مَا قَالَ أَهْلُهَا فَقَالَتْ لاَهَا اللَّهِ إِذًا إِلاَّ أَنْ يَكُونَ الْوَلاَءُ لِي . فَقَالَ رَسُولُ اللَّهِ ﷺ " مَا هَذَا " . فَقَالَتْ يَا رَسُولَ اللَّهِ إِنَّ بَرِيرَةَ أَتَتْنِي تَسْتَعِينُ بِي عَلَى كِتَابَتِهَا فَقُلْتُ لاَ إِلاَّ أَنْ يَشَاءُوا أَنْ أَعُدَّهَا لَهُمْ عَدَّةً وَاحِدَةً وَيَكُونُ الْوَلاَءُ لِي فَذَكَرَتْ ذَلِكَ لأَهْلِهَا فَأَبَوْا عَلَيْهَا إِلاَّ أَنْ يَكُونَ الْوَلاَءُ لَهُمْ . فَقَالَ رَسُولُ اللَّهِ ﷺ " ابْتَاعِيهَا وَاشْتَرِطِي لَهُمُ الْوَلاَءَ فَإِنَّ الْوَلاَءَ لِمَنْ أَعْتَقَ " . ثُمَّ قَامَ فَخَطَبَ النَّاسَ فَحَمِدَ اللَّهَ وَأَثْنَى عَلَيْهِ ثُمَّ قَالَ " مَا بَالُ أَقْوَامٍ يَشْتَرِطُونَ شُرُوطًا لَيْسَتْ فِي كِتَابِ اللَّهِ عَزَّ وَجَلَّ يَقُولُونَ أَعْتِقْ فُلاَنًا وَالْوَلاَءُ لِي كِتَابُ اللَّهِ عَزَّ وَجَلَّ أَحَقُّ وَشَرْطُ اللَّهِ أَوْثَقُ وَكُلُّ شَرْطٍ لَيْسَ فِي كِتَابِ اللَّهِ فَهُوَ بَاطِلٌ وَإِنْ كَانَ مِائَةَ شَرْطٍ " . فَخَيَّرَهَا رَسُولُ اللَّهِ ﷺ مِنْ زَوْجِهَا وَكَانَ عَبْدًا فَاخْتَارَتْ نَفْسَهَا . قَالَ عُرْوَةُ فَلَوْ كَانَ حُرًّا مَا خَيَّرَهَا رَسُولُ اللَّهِ ﷺ .