Sunan an-Nasa'i 4052
سنن النسائي#4052Da'ifIt was narrated that Jarir said:"The Messenger of Allah [SAW] said: 'If a slave runs away to the land of Shirk, it becomes permissible to shed his blood
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahDaif Isnaad
Al-AlbaniDaif Isnaad
Zubair Ali ZaiDaif
In-book reference: 37:87