Halsall, Paul (June 1997). "Theodosian Code XVI.i.2". Medieval Sourcebook: Banning of Other Religions. Fordham University. Archived from the original on 2007-02-27. Retrieved 2006-11-23.
Basic Law of Governance (Chapter one, Article one), saudiembassy.net, "The Kingdom of Saudi Arabia is a sovereign Arab Islamic State. Its religion is Islam. Its constitution is Almighty God's Book, The Holy Qur'an, and the Sunna (Traditions) of the Prophet (PBUH). Arabic is the language of the Kingdom. The City of Riyadh is the capital."
"Iranian Constitution". www.servat.unibe.ch. Article 12. Retrieved 2023-01-02. The official religion of Iran is Islam and the Twelver Ja'fari school, ...
Halsall, Paul (June 1997). "Theodosian Code XVI.i.2". Medieval Sourcebook: Banning of Other Religions. Fordham University. Archived from the original on 2007-02-27. Retrieved 2006-11-23.