(17) باب كَرَاهِيَةِ التَّطَاوُلِ عَلَى الرَّقِيقِ
Narrated `Abdullah:
The Prophet (ﷺ) said, "If a slave serves his Saiyid (i.e. master) sincerely and worships his Lord (Allah) perfectly, he will get a double reward."
Reference: Sahih al-Bukhari 2550
In-book reference: Book 49, Hadith 34
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 46, Hadith 726