Soham with Shanmukhi Mudra.
This last stage is the most difficult and requires intense imagination, patience and control over the breathing process. First practice Shanmukhi mudra. Close your ears with the thumbs. Close your eyes with the index fingers, and lips with the ring and little fingers. Take a deep breath in and then close your nostrils with your middle fingers.
While holding your breath inside, rotate your consciousness in the spinal column. With the vibrations of So descend from ajna to mooladhara, and with the vibrations of Ham ascend from mooladhara to ajna. Then release the breath. During this brief period practice self–awareness. Practice 11 rounds.
In the second part of the sixth stage, you need not practice Shanmukhi mudra. Simply inhale and retain the breath. During the period of retention, rotate your consciousness in the spinal column. Descend from ajna to mooladhara; pause at mooladhara for a few seconds, then ascend to ajna and exhale. Rest and practice self–awareness in between rounds. Practice 54 rounds.
Source: Swami Satyananda Saraswati.
Aim Hrim Klim