(103) بَابُ إِذَا نَصَحَ الْعَبْدُ لِسَيِّدِهِ
Abu Musa reported that the Messenger of Allah, may Allah blesshim and grant him peace, said, "The slave who is excellent in the worshipof his Lord and fulfils the duties of obedience and counsel which he owesto his master, has two rewards."
Reference: Al-Adab Al-Mufrad 204
In-book reference: Book 9, Hadith 49
English translation: Book 9, Hadith 204