Sunan an-Nasa'i 4054
سنن النسائي#4054Da'ifIt was narrated that Jarir said:"Any slave who 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: 37:89