Biography of Ubayy ibn Ka'b
(s) Ubayy ibn Ka'b ibn 'Abd Thawr.
Abu Musa informed us by license; Abu 'Ali informed us by permission, from the book of Abu Ahmad; 'Umar ibn Ahmad informed us; 'Umar ibn al-Hasan informed us; al-Mundhir ibn Muhammad informed us, al-Husayn ibn Muhammad informed us, on the authority of 'Ali ibn Muhammad al-Mada'ini, on the authority of his sources, they said:
«A man of Khuza'ah came in a group of his people, among whom was Ubayy ibn Ka'b ibn 'Abd Thawr, and they gave the pledge of allegiance to the Messenger of Allah ﷺ and embraced Islam», Abu Musa related it.
And this delegation mentioned in this entry was from Muzaynah.