Al-Shafi'i
Al-Shafi'i (Arabic: الشَّافِعِيّ, romanized: al-Shāfiʿī; IPA: [a(l) ʃaːfiʕiː] ;767–820 CE) was a Muslim scholar, jurist, muhaddith, traditionist, theologian, ascetic, and eponym of the Shafi'i school of Sunni Islamic jurisprudence. He is known to be the first to write a book upon the principles of Islamic jurisprudence, having authored one of the earliest work on the subject: al-Risala.