Abu Amr Ashhab ibn Abd al-Aziz al-Qaysi was a student of Imam Malik and, after Ibn al-Qasim, was recognized as the leading authority of the Maliki school in Egypt. He studied under some twenty hadith scholars including Malik ibn Anas, al-Layth ibn Sa'd, Ibn Wahb, and Sufyan ibn Uyayna, while scholars such as Sahnun, al-Harith ibn Miskin, and Ibn al-Mawwaz learned fiqh and hadith from him. He was considered a reliable transmitter of Malik's narrations, and his legal opinions were cited as evidence in Maliki works written during and after his lifetime. Having briefly served as a scribe in Egypt's land-tax administration and known for his generosity, he died in Cairo on 22 Sha'ban 204 AH (11 February 820 CE) and was buried in the al-Qarafa al-Sughra cemetery near the tomb of Ibn al-Qasim. Sources: TDV İslam Ansiklopedisi "Eşheb el-Kaysî"; Wikidata Q12179848.