Śūraṅgama Sūtra
The Śūraṅgama Sūtra (Sanskrit: शूरङ्गम सूत्र; ) (Taisho 945) is a Mahayana Buddhist sutra that has been especially influential in Chan Buddhism. The general doctrinal outlook of the "Śūraṅgama Sūtra" is that of esoteric Buddhism and Buddha-nature, with some influence from Yogacara. There have been questions regarding the translation of this sutra as it was not sponsored by the Imperial Chinese Court and as such the records regarding its translation in the early eighth century were not carefully preserved (see History); however, it has never been classified as apocrypha in any Chinese-language Tripitakas including the Taisho Tripitaka where it is placed in the Esoteric Sutra category (密教部). The sutra was translated into Tibetan during the late eighth to early ninth century and a complete translation exists in Tibetan, Mongolian and the Manchu languages (see Translations). Current consensus is that the text is a compilation of Indic materials with extensive editing in China, rather than a translation of a single text from Sanskrit. A Sanskrit language palm leaf manuscript consisting of 226 leaves with 6 leaves missing which according to the introduction "contains the Śūraṅgama Sūtra" was discovered in a temple in China; it has yet to be verified.