This research deals with the attitude of the Muzina tribe towards the Islamic call after identifying its lineage and dwellings, then the beginning of contact with its men and their entry into Islam in increasing numbers, and following up on the role of the members of this tribe in the events and conquests that faced Muslims in Medina in the life of the Messenger "may God bless him and grant him peace". The research also dealt with identifying The role of this tribe in countering apostasy movements during the reign of Caliph Abu Bakr Al-Siddiq, may God be pleased with him, and the heroic stances and images that they recorded that reveal the depth of faith, courage, courage and sacrifice rich in lessons and lessons.