Urwah (may Allah have mercy on him) narrates from Sayyidah Umm Habibah (may Allah be pleased with her) that she was married to Ubaydullah bin Jahsh, and Ubaydullah died in the land of Abyssinia. Then the Negus married Umm Habibah (may Allah be pleased with her) to the Prophet (peace and blessings be upon him), paid four thousand as her mahr from his own side, and sent her to the Prophet (peace and blessings be upon him) with Shurahbil bin Hasanah (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13797