Where does velayat-e faqih come from?

Velayat-e faqih, or "Guardianship of the Islamic Jurist," originates from Shia Islamic thought and was notably articulated by Iranian cleric Ayatollah Ruhollah Khomeini in the 20th century. It posits that a qualified Islamic jurist should hold political authority and governance over the Muslim community, particularly during the absence of the Imam Mahdi. This concept gained prominence during the Iranian Revolution of 1979, shaping Iran's political system and its governance structure.