Since the 1979 Islamic Revolution in Iran, Saudi Arabia has been concerned about the potential influence of Iran’s supreme leader among its Shi’a population, especially since Ayatollah Sayyid Ali Khamenei took on the title of Vali-ye faqih, or “guardian-jurist.” Such concern is understandable given that the two countries are both neighbors and rivals: Khamenei is a marj’a, the highest-ranking Shi’a religious authority, but he is also the commander-in-chief of the Iranian Armed Forces. This paper aims to investigate the Iranian influence within the Shi’a community in Saudi Arabia by focusing on the followers of the supreme leader’s marj’aiyyah, known as “Khat al-Imam,” and its military wing, “Hezbollah Al-Hejaz,” often held responsible for carrying out the 1996 Khobar Towers bombing.