كتاب الإيمان
1  
The Book of Faith
(31)
Chapter: Calling a runaway slave a kafirg
(31)
باب تَسْمِيَةِ الْعَبْدِ الآبِقِ كَافِرًا ‏‏
Sahih Muslim 68

It is narrated on the authority of Jarir that he heard (the Holy Prophet) saying, The slave who fled from his master committed an act of infidelity as long as he would not return to him. Mansur observed:

By God, this hadith was narrated from the Apostle (may peace and blessings be upon him), but I do not like that this should be narrated on my authority here in Basra.
حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ السَّعْدِيُّ، حَدَّثَنَا إِسْمَاعِيلُ، - يَعْنِي ابْنَ عُلَيَّةَ - عَنْ مَنْصُورِ بْنِ عَبْدِ الرَّحْمَنِ، عَنِ الشَّعْبِيِّ، عَنْ جَرِيرٍ، أَنَّهُ سَمِعَهُ يَقُولُ ‏ "‏ أَيُّمَا عَبْدٍ أَبَقَ مِنْ مَوَالِيهِ فَقَدْ كَفَرَ حَتَّى يَرْجِعَ إِلَيْهِمْ ‏"‏ ‏.‏ قَالَ مَنْصُورٌ قَدْ وَاللَّهِ رُوِيَ عَنِ النَّبِيِّ صلى الله عليه وسلم وَلَكِنِّي أَكْرَهُ أَنْ يُرْوَى عَنِّي هَا هُنَا بِالْبَصْرَةِ ‏.‏
Reference : Sahih Muslim 68
In-book reference : Book 1, Hadith 134
USC-MSA web (English) reference : Book 1, Hadith 129
  (deprecated numbering scheme)