context: Omar bin Abdulaziz's caliphate was characterized by a number of characteristics, including: justice and equality, and the response to grievances that his predecessors from the Umayyads had committed, isolating and punishing all unjust rulers, as he re-worked the Shura, and therefore many scholars counted him fifth The rightly guided caliphs, as he was interested in Islamic law, and ordered the codification of the Prophet’s hadith. The caliphate lasted for two years, five months, and four days, until he was poisoned in the year 101 AH, and Yazid bin Abdul Malik assumed the caliphate after him.
question: What was the era of the Abbasid caliph Omar bin Abdul Aziz known?
answers.text: justice and equality