Al-Haytham bin Adi said: The first of the wives of the Prophet (peace and blessings be upon him) to die was Zaynab bint Jahsh (may Allah be pleased with her); she died during the caliphate of Sayyiduna Umar (may Allah be pleased with him). The last of them to die was Umm Salamah (may Allah be pleased with her); she died in the time of Yazid bin Mu'awiyah, in the year 62 AH.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19804