Abu Ja'far (may Allah have mercy on him) said that the Messenger of Allah (peace and blessings be upon him) sent Amr bin Umayyah al-Damri (may Allah be pleased with him) to the Negus, and he, acting as agent on his (peace and blessings be upon him) behalf, married him to Umm Habibah bint Abi Sufyan (may Allah be pleased with her), and paid 400 dinars on his (peace and blessings be upon him) behalf.
(b) Concerning the marriage of Umm Kulthum bint Ali (may Allah be pleased with her) to Umar bin al-Khattab (may Allah be pleased with him), (it is reported) that Ali (may Allah be pleased with him) said to Hasan and Husayn (may Allah be pleased with them both): "Arrange the marriage of your uncle," so the two of them married her to him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13796