Abū Yūsuf Yaʿqūb b. Ibrāhīm al-Anṣārī al-Kūfī (113-82/731-98) was a prominent Ḥanafī jurist whose opinions, with those of Abū Ḥanīfa and Muḥammad al-Shaybānī, form the core of Ḥanafī fiqh scholarship. According to biographical traditions, Abū Yūsuf-a descendant of Saʿd b. Ḥabta, who lived in Medina during the time of the prophet Muḥammad-was born in Kufa and died in Baghdad at the age of sixty-nine. A number of sources relate that Abū Yūsuf came from a poor family and that Abū Ḥanīfa (