Tablighi Jamaat is an international Islamic religious movement. It focuses on exhorting Muslims to be more religiously observant and encourages fellow members to return to practise their religion according to the teachings of the Islamic prophet Muhammad, and secondarily give dawah (calling) to non-Muslims. "One of the most widespread Sunni" islah (reform) and called "one of the most influential religious movements in 20th-century Islam," the organisation is estimated to have between 12 and 80 million adherents worldwide, spread over 150 countries, with the majority living in South Asia.