Abu’l-Qāsim Ismāʿīl ibn ʿAbbād ibn al-ʿAbbās (Persian: ابوالقاسم اسماعیل بن عباد بن عباس; born 938 - died 30 March 995), better known as Ṣāḥib ibn ʿAbbād (صاحب بن عباد), also known as al-Ṣāḥib (الصاحب...