Sunan an-Nasa'i 4051
سنن النسائي#4051SahihIt was narrated that Jarir bin 'Abdullah said:"If a slave runs away to the land of Shirk, there is no protection (or immunity) for him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 37:86