Afterwards mantras had been used extra to protect the spiritual life of the chanter, and sections on mantras started to be included in some Mahayana sutras including the White Lotus Sutra, plus the Lankavatara Sutra. The scope of security also transformed On this time. From the Sutra of Golden Mild, https://sjbdirectory.com/listings593865/how-much-you-need-to-expect-you-ll-pay-for-a-good-mantra