The role of opposition in Islam : a case study of the life of 'Umar Ibn al-Khattab 2026-02-16T05:26:40+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Busul, Asad Namir (Qur'an Society, 1999)