Sunan an-Nasa'i 4053
سنن النسائي#4053Da'ifأَخْبَرَنَا أَحْمَدُ بْنُ حَرْبٍ، قَالَ حَدَّثَنَا قَاسِمٌ، قَالَ حَدَّثَنَا إِسْرَائِيلُ، عَنْ أَبِي إِسْحَاقَ، { عَنِ الشَّعْبِيِّ، } عَنْ جَرِيرٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِذَا أَبَقَ الْعَبْدُ إِلَى أَرْضِ الشِّرْكِ فَقَدْ حَلَّ دَمُهُ " .
It was narrated from Jarir that:The Prophet [SAW] said: "If a slave runs away to the land of Shirk, it becomes permissible to shed his blood
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahDaif Isnaad
Al-AlbaniDaif Isnaad
Zubair Ali ZaiDaif
In-book reference: 37:88