 A member of the Banu Najjar tribe living in Medina, Nusaybah was the sister of Abdullah bin K'ab, and the mother of Abdullah and Habib ibn Zayd al-Ansari.When 74 leaders, warriors, and statesmen of Medina descended on al-Aqabah to swear an oath of allegiance to Islam following the teaching of the new religion by Mus`ab ibn `Umair in the city, Nusaybah and Umm Munee Asma bint ʿAmr bin 'Adi were the only two women to personally pledge directly to the Islamic prophet Muhammad.The latter's husband, Ghazyah bin ʿAmr, informed Muhammad that the women also wanted to give their "bayah" in person, and he agreed.