Umm Ayman (d. 650). Umm Ayman, also known as Barakah, was an emancipated Ethiopian slave and a renowned companion of the Prophet Muhammad and was one of the few individuals who closely knew the Prophet from his birth until his death. She was married to Zayd b. al-Ḥāritha, the adopted son of the Prophet, and was among the closest and most trusted confidants of the Prophet Muhammad. She was among the earliest converts to Islam and participated in the battle of Uhud, caring and tending for the wounded. She died in 644 and is buried in the Jannat al-Baqī’ cemetery in Medina.
http://uwpress.wisc.edu/books/4789.htm (An edition and translation of Omar ibn Sa’id’s autobiography)