Khechari-mudra — is a yoga practice which is performed by placing the tongue above the soft palate and stretching it into the nasal cavity and further, to the area between eyebrows. This practice helps to awaken spiritual energies of the body. According to Abhinavagupta (approx. 950 — 1020 AD), khecari mudra is «the stance of moving or flying through the void of the supreme consciousness». This mudra is also described in the Hatha Yoga Pradipika.