Al-Zuhri related: Umm Ayman, the mother of Usamah bin Zayd, was from Abyssinia, and she was the slave-girl of Abdullah bin Abd al-Muttalib, and she used to look after the Prophet (peace and blessings be upon him) in his childhood. The Messenger of Allah (peace and blessings be upon him) freed her, then married her to Zayd bin Harithah (may Allah be pleased with him). She passed away five months after the Prophet (peace and blessings be upon him). This is how al-Zuhri related it, whereas another narration states that she lived on until after the death of Sayyiduna Umar bin al-Khattab (may Allah be pleased with him).
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21682