In Sanskrit this text is known as amrta-astangahrdayupadesatantra; in Tibetan: bDud rtsi snying po yan lag bragyad pa gsang ba man ngag gi rgyud translated into English as Ambrosia Heart Tantra: the Four Secret Oral Teachings on the Eight Branches of the Science of Healing. The original Sanskrit work was probably written during the fourth century A.D. It was translated into Tibetan by Vairochana and given to King Khri-srong Ide’u-btsan and to the royal court ...
