The Holy Prophet (sa) formed a bond of brotherhood between Hazrat Ubayy (ra) and Hazrat Talha bin Ubaidillah (ra). According to another narration, the Holy Prophet (sa) established a bond of brotherhood between Hazrat Ubayy (ra) and Hazrat Saeed bin Zaid (ra).
(Ibn Saad, Al-Tabaqat al-Kubra, Vol. 3 [Beirut, Lebanon: Dar al-Kutub al-Ilmiyyah, 2017) 378]