Riyad as-Salihin, Book 12, Hadith 1364 (In-Book) ⓘ
Abu Musa Al-Ash'ari (May Allah be pleased with him) reported: The Messenger of Allah said, "A slave who worships his Rubb (Allah) well and discharges efficiently and faithfully the duties which are assigned to him by his master, will have a double reward."[Al-Bukhari].
وعن أبي موسى الأشعري قال: قال رسول الله صلى الله عليه وسلم : "المملوك الذي يحسن عبادة ربه ويؤدي إلى سيده الذي عليه من الحق، والنصيحة والطاعة له أجران" ((رواه البخاري)).