Sahih Muslim
The Book of Divorce (Kitab Al-Talaq)
Book Number: 009 / Hadith Number: 3604
Abu Huraira (Allah be pleased with him) reported: I heard Allah's Messenger (may peace be upon him) as saying: He who emancipates a believing slave. Allah will set free from Fire his every limb for every limb of his (slave's), even his private parts for his.