al-'Ilm wa adab al-'alim wa al-muta'alim Ilm wa adab al-'alim wa al-muta'alim - al-Nawawi, 1233-1277 (Beirut : Dar al-Khair, 1993)
Keywords: al-Shafi'i, Muhammad ibn Idris, -- 767 or 8-820.; Islamic ethics