After Hazrat Suhaib (ra) migrated from Mecca to Medina, the Holy Prophet (sa) established a bond of brotherhood between him and Hazrat Harith (ra) bin Simmah. Hazrat Suhaib (ra) participated in the battles of Badr, Uhud, Khandaq and all other battles alongside the Holy Prophet (sa).
(Usdul Ghabah, Vol. 3, p. 39, Suhaib bin Sinaan, Dar-ul-Kutub al-Ilmiyyah, Beirut, 2016)