Amritasiddhi

The Amṛtasiddhi (Sanskrit: अमृतसिद्धि, "the attainment of immortality"), written in a Buddhist environment in about the 11th century, is the earliest substantial text on what became haṭha yoga, though it does not mention the term.^[2] The work describes the role of bindu in the yogic body, and how to control it using the Mahamudra so as to achieve immortality (Amṛta). The implied model is that bindu is constantly lost from its store in the head, leading to death, but that it can be preserved by means of yogic practices. The text has Buddhist features, and makes use of metaphors from alchemy.

A verse in a paper manuscript of the Amṛtasiddhi, possibly a later copy, asserts its date as 2 March 1160. It is written in two languages, Sanskrit and Tibetan.^[2] A critical edition based on all surviving manuscripts was published in 2021 by the Indologists James Mallinson and Péter-Dániel Szántó.