Sahih Bukhari Volume 009, Book 085, Hadith Number 080.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 85. Saying Something under Compulsion (Ikraah)
Narrated By Jabir : A man from the Ansar made his slave, a Mudabbar. And apart from that slave he did not have any other property. This news reached Allah's Apostle and he said, "Who will buy that slave from me?" So Nu'aim bin An-Nahham bought him for 800 Dirham. Jabir added: It was a coptic (Egyptian) slave who died that year.