Saidna Umar bin Abdul Aziz, may Allah have mercy on him, said: If a prisoner goes to the Romans and becomes a Christian, then if this is proven, distribute his wealth among his heirs.
Hadith Referenceسنن سعید بن منصور / كتاب الجهاد / 4008
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 312، 2832»