Any slave who flees from his masters and joins the enemy has made his own life forfeit.
أخبرنا علي بن حجر قال حدثنا شريك عن أبي إسحق عن عامر
أيما عبد أبق من مواليه ولحق بالعدو فقد أحل بنفسه
[Sahih] Previously mentioned, no. 4057, and it is in Kubra, no. 3519. Amir is Shaybi.