Note 4 — Chapter IX · On the Supreme Cause of All. (Parama Kárana).
Viharilala Mitra translation
The
khecarí
or aerial mode of meditation is said to confer liberation from sickness and acts and the grasp of death. Thus;
Napídyate rogena nacha lipyate karmaná, Bádhyate sa na kalena, yo mudrám-vetti khecarím.
The mode of conducting it is described as follows.
Kapála kuhare jihvá, pravesitá viparítagá, Bhruvorantargatá drishtir, mudrá-bhavati khecarí.