Sahih Muslim 1665
Sahih Muslim · Book 27: The Book of Oaths · The reward of a slave who is sincere towards his master and worships Allah properly
وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ ، حَدَّثَنَا أَبُو صَفْوَانَ الأُمَوِيُّ ، أَخْبَرَنِي يُونُسُ ، عَنِ ابْنِ شِهَابٍ ، بِهَذَا الإِسْنَادِ وَلَمْ يَذْكُرْ بَلَغَنَا وَمَا بَعْدَهُ .
This hadith has been transmitted on the authority of Abu Tahir but with a slight variation of words.