Abū ʾl-Yaqẓān ʿAmmār ibn Yāsir ibn ʿĀmir ibn Mālik al-ʿAnsī al-Maḏḥiǧī also known as Abū ʾl-Yaqẓān ʿAmmār ibn Sumayya was one of the muhajirun in the history of Islam and, for his dedicated devotion to Islam's cause, is considered to be one of the closest and most loyal companions of Muhammad and to Muslims; thus, he occupies a position of the highest prominence in Islam. Wikipedia