Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) bought a slave girl from his wife and made a condition that if he sold her, the wife would have the right to buy her. When this was asked to Sayyiduna Umar (may Allah be pleased with him), he said: "As long as someone else's condition remains, do not benefit from it."
Hadith Referenceسنن سعید بن منصور / كتاب الطلاق / 3428
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«إسناده صحيح، وأخرجه مالك فى «الموطأ» برقم: 2280، وسعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 2251، والبيهقي فى«سننه الكبير» برقم: 10939، وعبد الرزاق فى «مصنفه» برقم: 14291»