Abu Burdah bin Abi Musa al-Ash'ari (may Allah be pleased with him) narrates concerning Sayyiduna Ja'far bin Abi Talib (may Allah be pleased with him) coming to Abyssinia, entering upon the Negus, informing him about the beloved Prophet (peace and blessings be upon him), the Negus's conversation about Isa bin Maryam, and his saying "Welcome", and that he said: I affirm that the one from whom you have come is the Messenger of Allah, and that he is indeed the one whose glad tidings Isa bin Maryam gave. Were it not for the kingship I am in, I would come to him and carry his sandals.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 7031