India, ca. 700
A Buddhist Tantra of the late seventh or early eighth century. Attributed to Anangavajra, one of the 84 Mahasiddhas, the work contains a number of features that highlight the earliest teachings of Tantric Buddhism and shows clearly how much this has been formed by the earlier, Indian variant.
The text describes a number of siddhis, prescribes rather indiscriminate sexual relations, and even allows union between mother and son, brother and sister, or father and daughter.
The work also clearly defines prajna, "awareness wisdom", as an inherently female prerogative, to be obtained by men only through the agency of women; for example through the Union of Skillful Means and Profound Cognition; hence the text's title based on prajna and upaya.