It is narrated from Sayyiduna Jarir bin Abdullah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: When a slave runs away and joins the enemy, and then dies in that state, he will be a disbeliever.
Hadith Referenceالفتح الربانی / كتاب العتق / 5260
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«أخرجه بنحوه مسلم: 70، (انظر مسند أحمد ترقيم الرسالة: 19225 ترقیم بيت الأفكار الدولية: 19438»
Brief Explanation
Benefits: … If, along with this crime, he actually committed any act of disbelief (kufr), then he will become a disbeliever (kafir). Otherwise, the meaning of this hadith will be that he has shown ingratitude and lack of appreciation for a blessing like Islam.