The term "Mihna" refers to a period of religious persecution and trial that took place during the early Islamic era, particularly under the Abbasid Caliphate. It primarily involved the testing of scholars and believers regarding their beliefs, especially concerning the nature of the Qur'an. Those who refused to conform to the official doctrine faced severe consequences, including imprisonment and torture. The most notable event of the Mihna occurred during the reign of Caliph Al-Ma'mun in the 9th century. He promoted the idea that the Qur'an was created rather than uncreated, leading to a significant conflict with traditionalist scholars. This period ended with the eventual restoration of traditional beliefs and the decline of the Mihna's influence.