The reason for the Buddha's teaching of the Surangama Sutra was that Ananda was bewitched by the evil spell of Madanga. When Ananda's body was about to be destroyed, the Buddha ordered Manjushri Bodhisattva to go to save Ananda by holding the Surangama Mantra, and Ananda was saved and returned to the Buddha.
Buddhist stories that subvert the Shurangama Mantra
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