Abdul Wahid bin Ayman narrates from his father: I went to the service of Sayyida Aisha, and I said to her: "O Mother of the Believers! I was with Utbah bin Abu Lahab (that is, I was his slave), his son and his wife sold me and imposed the condition of wala (allegiance). So will I be considered the freed slave of someone?" She replied: "O my son! Barirah came to me, she had made a contract of manumission. She said: 'Buy me.' I said: 'Alright.' She said: 'My owners will not sell me until they impose the condition of wala.' So I said: 'Then I have no need of you.' When the Prophet (peace be upon him) heard this or was informed of it, he asked: 'What is Barirah saying?' I told him about it, so the Prophet said: 'Buy her and set her free, and let them be as they are, let them impose whatever conditions[1] they wish.' (Sayyida Aisha says) So I bought her and set her free, then the Prophet (peace be upon him) said: 'The right of wala belongs to the one who sets free, even if (the other party) imposes a hundred conditions.'"
Hadith Referenceسنن الدارقطني / كتاب البيوع / 2872
Hadith Takhrij«أخرجه البخاري فى ((صحيحه)) برقم: 456، 1493، 2155، 2168، 2536، 2561، 2563، 2564، 2565، 2578، 2717، 2726، 2729، 2735، 5097، 5279، 5284، 6717، 6751، 6754، 6758، 6760، ومسلم فى ((صحيحه)) برقم: 1075،1504 ، وأبو داود فى ((سننه)) برقم: 2233، 2234، 2235، 2236، 2916، 3929، بدون ترقيم، والترمذي فى ((جامعه)) برقم: 1154، 1155، 1256، 2124، 2125، والدارمي فى ((مسنده)) برقم: 2335، 2336، 2337، وابن ماجه فى ((سننه)) برقم: 2074، 2076، 2077، 2521، وسعيد بن منصور فى ((سننه)) برقم: 279، 1259، والدارقطني فى ((سننه)) برقم: 2871، 2872، 3753، 3754، 3755، 3756، 3757، 3758، 3759، 3760، 3761، 3762، 3763، 3764، 3765، 3766، 3775، 3776، وأحمد فى ((مسنده)) برقم: 24687»