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The use of politically and religiously-motivated violence dates back to the early history of Islam, its origins are found in the behavior, sayings, and rulings of the Islamic prophet Muhammad, his companions, and the first caliphs in the 7th, 8th, and 9th centuries CE. Mainstream Islamic law stipulates detailed regulations for the use of violence, including corporal and capital punishment, as well as how, when, and against whom to wage war.