Beginning of the codification of knowledge

al-Suyuti, quoting al-Dhahabi, says that in 143 AH the scholars of Islam began to record in writing hadith, jurisprudence and exegesis (tadwin). ²

According to the report, Ibn Jurayj wrote in Mecca, Malik wrote the Muwatta' in Medina, and al-Awza'i wrote in Syria. Ibn Abi Arawba, Hammad ibn Salama and others wrote in Basra, Ma'mar in Yemen, and Sufyan al-Thawri in Kufa. Ibn Ishaq wrote the Maghazi, and Abu Hanifa wrote on jurisprudence and opinion. ²

Shortly after, Hushaym, al-Layth and Ibn Lahi'a wrote, then Ibn al-Mubarak, Abu Yusuf and Ibn Wahb. Knowledge was increasingly recorded and arranged into chapters, and books of grammar, language, history and the days of the people were written down. Before this era, the imams used to speak from memory, or narrate from unarranged written pages. ²

The event took place in the caliphate of al-Mansur. The Gregorian date is derived.