Calling a runaway slave a kafirg Sahih Muslim 69
Arabic hadith text
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنْ دَاوُدَ، عَنِ الشَّعْبِيِّ، عَنْ جَرِيرٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَيُّمَا عَبْدٍ أَبَقَ فَقَدْ بَرِئَتْ مِنْهُ الذِّمَّةُ "
Translation
It is narrated on the authority of Jarir that the Messenger of Allah (may peace and blessings be upon him) observed
The slave who fled from his master, responsibility with regard to him was absolved.