It is narrated from Amr bin Dinar that a man, after his death, instructed for the emancipation of his slave, while he had no other wealth besides him. So the Messenger of Allah ﷺ said: "Who will buy him from me?" Na’eem bin Abdullah (may Allah be pleased with him) bought him for eight hundred dirhams and paid its price.
Hadith Referenceمسند الإمام الشافعي / كتاب العتق والولاء والمدبر والمكاتب وحسن الملكة / 1092
Hadith Takhrijاخرجه البخاری، کفارات الأيمان، باب عتق المدبر وام الولد والمكاتب في الكفارة .... الخ (6716)، (6947) ـ ومسلم، الایمان، باب جواز بیع المدبر (997 - بعد 1503)۔