Abdullah ibn Umar
that "in the year 56 AH Muawiyah called on the people including those within the outlying territories to pledge allegiance to his son, Yazeed, to be his heir to the Caliphate after him. Almost all the subjects offered their allegiance, with the exception of Abdur Rahman bin Abu Bakr (the son of Abu Bakr), Abdullah ibn Umar (the son of Umar), al-Husain bin Ali (the son of Ali), Abdullah bin Az-Zubair (The grandson of Abu Bakr) and Abdullah ibn Abbas (Ali's cousin). Because of this Muawiyah passed through al-Madinah on his way back from Makkah upon completion of his Umrah Pilgrimage where he summoned each one of the five aforementioned individuals and threatened them. The speaker who addressed Muawiyah sharply with the greatest firmness amongst them was Abdurrahman bin Abu Bakr as-Siddeeq, while Abdullah bin Umar bin al-Khattab was the most soft-spoken amongst them.