Essence of Secrets, Guhyagarbha. The widely renowned tantra of the Early Translations which, according to Jamgön Kongtrül, is the chief of the Eighteen Mahayoga Tantras, exalted above them all like the banner of victory. The first text in Vol. PHA of the Nyingma Gyübum. A great number of commentaries on this tantra is found in the Nyingma Kama collection
Sangwey Nyingpo