The Vedas, The sacred texts of Hinduism, were the 1st e-book to say them. Yantras were initially applied as a Instrument for ritual worship and later on turned connected with a mystical diagram and magical spell. Yantras affiliated with wellbeing, like the Mahamrityunjaya Yantra, is said to obtain therapeutic Qualities. https://www.youtube.com/@Mahavidyabaglamukhi