Abū al-Qāsim al-Ḥakīm al-Samarqandī, Isḥāq b. Muḥammad b. Ismāʿīl b. Ibrāhīm b. Zayd, was a Ḥanafī sage and scholar from Transoxania. He lived from the end of the 3rd/9th to the first half of the 4th/10th century.

Abū al-Qāsim's life marked a turning-point in the formation of the ascetic doctrines and teachings of Ḥanafī Sunnis in the east, and his al-Sawād al-aʿẓam was for a long time a major reference source on doctrine for many Ḥanafīs. Little is known about his life apart f…