(6) باب فَضْلِ الْعِتْقِ
Abu Huraira (Allah be pleased with him) reported:
I heard Allah's Messenger (ﷺ) 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.
Reference: Sahih Muslim 1509 c
In-book reference: Book 20, Hadith 27
USC-MSA web (English) reference(deprecated numbering scheme): Book 9, Hadith 3604