Abu al-Tufayl narrates from Hudhayfah (may Allah be pleased with him): The Messenger of Allah (peace and blessings be upon him) came out to us and said: "Offer the funeral prayer for a brother of yours who has died in a land other than yours." The Companions asked: Who is he? He (peace and blessings be upon him) said: "The Negus (al-Najashi)." So the Companions offered the funeral prayer for him. The Negus had treated well those Muslims who had emigrated and fled to him.
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3033