The Vedas, the sacred texts of Hinduism, ended up the initial book to mention them. Yantras were being originally employed like a Software for ritual worship and later on became connected to a mystical diagram and magical spell. To Lakshmi: oṃ śrīṃ hrīṃ śrīṃ kamale kamalālaye prasīda prasīda; oṃ śrīṃ https://www.youtube.com/@Mahavidyabaglamukhi