ENOfficial
Jarir reported the Prophet (ﷺ) as saying, “When a slave runs away and reverts to polytheism he may lawfully be killed.” Abu Dawud transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ جَرِيرٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «إِذَا أَبَقَ الْعَبْدُ إِلَى الشِّرْكِ فقد حلَّ دَمه» . رَوَاهُ أَبُو دَاوُد
sunnah.com