عبد الله بن الزبير
These original jurists and scholars also acted as a counterbalance to the rulers. When they saw injustice, all these scholars spoke out against it. As the state expanded outside Madina, the rights of the different communities, as they were constituted in the Constitution of Medina still applied. The Quran also gave additional rights to the citizens of the state and these rights were also applied. Ali, Hassan and Hussein ibn Ali gave their allegiance to the first three caliphs because they abided by these conditions. Later Ali the fourth caliph wrote in a letter "I did not approach the people to get their oath of allegiance but they came to me with their desire to make me their Amir (ruler). I did not extend my hands towards them so that they might swear the oath of allegiance to me but they themselves extended their hands towards me". But later as fate would have it (Predestination in Islam) when Yazid I, an oppressive ruler took power, Hussein ibn Ali the grandson of Muhammad felt that it was a test from God for him and his duty to confront him. Then Abd Allah ibn al-Zubayr, Qasim ibn Muhammad ibn Abu Bakr's cousin confronted the Umayyad rulers after Hussein ibn Ali was betrayed by the people of Kufa and killed by Syrian Roman Army now under the control of the Yazid I the Umayyad ruler. Abd Allah ibn al-Zubayr then took on the Umayyads and expelled their forces from Hijaz and Iraq. But then his forces were depleted in Iraq, trying to stop the Khawarij. The Ummayads then moved in. After a lengthy campaign, in his last hour Abd Allah ibn al-Zubayr asked his mother Asma' bint Abu Bakr the daughter of Abu Bakr the first caliph for advice. Asma' bint Abu Bakr replied to her son, she said: "You know better in your own self, that if you are upon the truth and you are calling towards the truth go forth, for people more honourable than you have been killed and if you are not upon the truth, then what an evil son you are and you have destroyed yourself and those who are with you. If you say, that if you are upon the truth and you will be killed at the hands of others, then you will not truly be free". Abd Allah ibn al-Zubayr left and was later also killed and crucified by the Syrian Roman Army now under the control of the Umayyads and led by Hajjaj. Muhammad ibn Abi Bakr the son of Abu Bakr the first caliph and raised by Ali the fourth caliph was also killed by the Ummayads. Aisha then raised and taught her son Qasim ibn Muhammad ibn Abu Bakr who later taught his grandson Jafar al-Sadiq.