Abu Ishaq ash-Shirazi

Abu Ishaq Ibrahim ibn Ali ibn Yusuf ash-Shirazi al-Firuzabadi (393-476 AH / 1003-1083 CE) was one of the most important Shafi'i jurists of the classical period. Born in Firuzabad, Fars (Iran), he studied jurisprudence in Shiraz before moving to Baghdad, where he became the leading Shafi'i scholar of the city and the pre-eminent teacher at the Nizamiyyah academy founded by the Seljuk vizier Nizam al-Mulk in 459 AH.

Ash-Shirazi's teaching at the Baghdad Nizamiyyah was one of the most influential in the history of Islamic education. He attracted students from across the Muslim world and trained many of the leading scholars of the subsequent generation. Among his notable students was al-Ghazali, who studied under him at the Nizamiyyah before being sent to study under Imam al-Haramayn al-Juwayni in Nishapur.

His most important works in Shafi'i jurisprudence are al-Muhadhdhab (The Refined), a comprehensive Shafi'i legal text that was later the subject of an important commentary by an-Nawawi (al-Majmu'); and at-Tanbih (The Reminder), a concise Shafi'i legal primer that became one of the standard teaching texts in the madhhab. He also authored works on legal methodology (usul al-fiqh) and biographical works on Shafi'i scholars.

Ash-Shirazi was known for his piety, his accessibility to students, and his mastery of jurisprudential debate. He passed away in Baghdad in 476 AH, widely mourned. His al-Muhadhdhab remains one of the most important reference texts in the Shafi'i tradition.