蘇悉地経 (Skt; Chin Su-hsi-ti-ching; Jpn Soshitsuji-kyo )
"Wonderful Accomplishment Sutra." A sutra of Esoteric Buddhism translated into Chinese by Shanwuwei (Skt Shubhakarasimha) in the eighth century.
There are two other Chinese translations.
The Susiddhikara Sutra is one of the three principal scriptures of Esoteric Buddhism, the other two being the Mahavairochana and Diamond Crown sutras.
In Japan, the tradition of Esoteric Buddhism within the Tendai school affords it particular reverence, while the True Word (Shingon) school ranks it below the other two sutras.
The Susiddhikara Sutra gives detailed instructions on the performance of incantations and prayers directed toward the so-called three divisions, or three groups, of honored ones.
These are the Buddha division, the Lotus division, and the Diamond division, symbolizing respectively the enlightenment, compassion, and wisdom of Mahavairochana Buddha.
The sutra also divides the purposes of those rituals into three: safety, the increase of benefit, and the subjugation of evil.