Riyad as-SalihinChapter 11Hadith 683
Full Sharh — Riyad as-Salihin 683
عن ابن عمر رضي الله عنهما أن رسول الله صلى الله عليه وسلم قال: "إن العبد إذا نصح لسيده، وأحسن عبادة الله، فله أجره مرتين" ((متفق عليه))
English Translation
Ibn 'Umar (May Allah be pleased with them) reported:: I heard the Messenger of Allah (ﷺ) saying, "When a slave is sincere to his master and worships Allah well, He will have a double reward." .
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Jihad
Hadith Number
683