Sahih al-Bukhari 2549
Book 49: Manumission of Slaves · Narrated by Abu Huraira
Arabic
حَدَّثَنَا إِسْحَاقُ بْنُ نَصْرٍ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنِ الأَعْمَشِ، حَدَّثَنَا أَبُو صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " نِعْمَ مَا لأَحَدِهِمْ يُحْسِنُ عِبَادَةَ رَبِّهِ وَيَنْصَحُ لِسَيِّدِهِ ".
English translation
Narrated Abu Huraira:The Prophet (ﷺ) said, "Goodness and comfort are for him who worships his Lord in a perfect manner and serves his master sincerely
Reference: Sahih al-Bukhari 2549, Book of Manumission of Slaves. English translation by Dr. Muhammad Muhsin Khan.