Bond of Brotherhood
Various narrations can be found in relation to the bond of brotherhood established with Hazrat Abu Ubaidah (ra). According to some, the Holy Prophet (sa) formed a bond of brotherhood between Hazrat Abu Ubaidah (ra) and Hazrat Salim (ra), the freed slave of Hazrat Abu Huzaifah (ra). According to others, the Holy Prophet (sa) formed a bond of brotherhood between him and Hazrat Muhammad bin Maslamah (ra). Yet, according to others, a bond of brotherhood was formed with Hazrat Sa‘d bin Mu‘az (ra).
(Ibn Sa‘d, al-Tabaqat al-Kubra, Vol. 3 [Beirut, Lebanon: Dar al-Kutub al-Ilmiyyah, 2012] 313.) (Ibn Hajar al-Asqalani, al-Isabah fi Tamyiz al-Sahabah, Vol. 3, Amir bin Abd-Allah [Beirut, Lebanon: Dar al-Kutub al-Ilmiyyah, 2005] 476.)