The moment
Expelled from his home town for preaching that venerating saints and tombs was idolatry, Muḥammad ibn ʿAbd al-Wahhāb found refuge with the emir of Dirʿiyya, Muḥammad ibn Saʿūd. Their alliance created the first Saudi state, whose forces took much of Arabia and sacked the Shiʿi shrine city of Karbala in 1801 (some sources say 1802).
People: Muḥammad ibn ʿAbd al-Wahhāb, Muḥammad ibn Saʿūd