Abu Hajal Muslim ibn Awsaja was a companion of what prophet who was the founder of islam, and who united Arabia into a single Muslim polity?
Abu Hajal Muslim ibn Awsaja Abu Hajal Muslim ibn Awsaja (Arabic: ابوحَجَل مسلم بن عوسجه الأسدي‎ ‎ ) was a companion of Islamic Prophet Muhammad. He assisted Muslim ibn Aqeel in Kufa. Then he joined Husayn ibn Ali army with his family. He was killed in battle of Karbala.
Salaf Salaf (Arabic: سلف‎ ‎ , "ancestors" or "predecessors"), also often referred to with the honorific expression of "al-salaf al-ṣāliḥ" (Arabic: السلف الصالح‎ ‎ , "the pious predecessors") are often taken to be the first three generations of Muslims, that is the generations of the Islamic Prophet Muhammad and his companions (the Sahabah), their successors (the Tabi‘un), and the successors of the successors (the Taba Tabi‘in).