The following practice is from The Yellow Book by Samael Aun Weor, explaining the transmutational practice of pranayama for men and women.
Esoteric Exercise of Pranayama for Men
1. The disciple places himself in a chair or on the floor with his face directed towards the East.
2. The disciple prays to his Divine Mother with complete devotion and sincerity asking that she awaken him, awaken his Kundalini.
3. The chest, neck, and head should be in a straight or vertical line. Do not lean your body to the front, to the back or to one side. The palms of the hands should rest on your legs in a very natural position.
4. The mind of the disciple should be directed towards his Innermost, his Divine Mother, loving her, adoring her.
5. Close your eyes so that the matters from the physical world do not distract you.
6. Cover or close your right nostril with the thumb of your right hand. Mentally vocalize the mantra “TON.”* At the same time inhale slowly through the cavity of your left nostril.
7. Now, close the left nostril with the index finger of your right hand. Hold your breath; retain your breath. Mentally send the Prana to the temple of Ephesus (the Chakra situated in the coccyx, the small bone at the lower extremity of the spinal column) in order to awaken the Kundalini and mentally pronounce the mantra “SA.”
8. Now exhale slowly from the right nostril mentally vocalizing the mantra “HAM.”
9. Now close the left nostril with your index finger.
10. Inhale the life, the Prana, through the right nostril mentally vocalizing the mantra “TON.” Close both of your nostrils with your index finger and your thumb and retain the breath. Mentally vocalize the mantra “RA.” Send the Prana to the magnetic center of the coccyx in order to awaken the Kundalini.
11. Exhale slowly through the left nostril mentally vocalizing the mantra “HAM.”
12. This constitutes one complete pranayama.
13. Repeat this complete process six more times (twice a day at dusk and dawn).
14. The devotee will kneel on the ground.
15. Once he is on the ground the devotee places the palms of his hands on the floor, the thumbs of the two hands together.
16. Prostrated on the ground, with his body inclined forward, with his head facing the East, and filled with supreme veneration he then places his forehead on his hands, Egyptian style.
17. Next, with his powerfully creative word, the disciple vocalizes the mantra “RA,” the mantra of the Egyptians. This mantra “RA” is vocalized by prolonging the sound of its two letters, as follows: RrrrrrrrrrrrrrrrrAaaaaaaaaaaa. Vocalize the mantra seven times.
Esoteric Exercise of Pranayama for Women
1. The disciple places herself in a chair or on the floor with her face directed towards the East.
2. With complete devotion and sincerity, the disciple prays to her Divine Mother asking that she awaken her; awaken her Kundalini.
3. The chest, neck, and head should be in a straight or vertical line. Do not lean your body to the front, to the back or to one side. The palms of the hands should rest on your legs in a very natural position.
4. The mind of the disciple should be directed towards her Innermost, her Divine Mother, loving her, adoring her.
5. Close your eyes so that the matters of the physical world do not distract you.
6. Cover or close the left nostril with the index finger of your right hand. Mentally vocalizing the mantra “TON.” At the same time inhale slowly through the cavity of the right nostril.
7. Now, close the right nostril with the thumb of your right hand. Hold your breath; retain your breath. Mentally send the Prana to the temple of Ephesus (the Chakra situated in the coccyx, the small bone at the lower extremity of the spinal column) to awaken the Kundalini and mentally pronounce the mantra “SA.”
8. Now exhale slowly from the left nostril mentally vocalizing the mantra “HAM.”
9. Next, close the right nostril with the thumb.
10. Inhale the life, the Prana through the left nostril, mentally vocalizing the mantra “TON.” Close both of your nostrils with the index finger and the thumb and retain the breath and mentally vocalize the mantra “RA.” Send the Prana to the magnetic center of the coccyx in order to awaken the Kundalini.
11. Exhale slowly through the right nostril mentally vocalizing the mantra “HAM.”
12. This constitutes one complete pranayama.
13. Repeat this complete process six more times (twice a day at dusk and dawn).
14. The devotee will kneel on the ground.
15. Once she is on the ground the devotee then places the palms of her hands on the floor, the thumbs of the two hands together.
16. Prostrated on the ground, with her body inclined forward, with her head facing the East, and filled with supreme veneration, she then places her forehead on her hands, Egyptian style.
17. Next, with her powerful creative word, the disciple vocalizes the Mantra “RA,” the mantra of the Egyptians. This mantra “RA” is vocalized by prolonging the sound of its two letters, as follows: RrrrrrrrrrrrrrrrrAaaaaaaaaaaa. Vocalize the mantra seven times.
The prior steps are all a part of Egyptian pranayama.
The mantra RA has the power to vibrate the Kundalini and the chakras, the result being the awakening of the mentioned chakras.
The mantras of pranayama are TON – SA – HAM; TON – RA – HAM. With this pranayama, the Kundalini can be awakened.
With pranayama we can come out of the darkness and become illuminated. With this pranayama we can disintegrate laziness and dullness.
Prana is related with the mind. The mind is the vehicle of willpower. Willpower must obey the Great Soul of the Word. Our internal vehicles must be controlled by pranayama.
Prana is life.
The right nasal cavity (nostril) is solar. The left nasal cavity is lunar. The two witnesses of the Book of Revelation are related to the nasal cavities. The two witnesses are a pair of nervous cords. The testicles (or ovaries in women) are united with the nasal cavities through these two nervous cords. We can say that the two cords begin in the testicles (or ovaries). The two testicles are the two oceans of Life. Moses found his Master between the two oceans.
In this chapter, we have taught Egyptian pranayama for the devotees of the occidental world.
Those who want to awaken their Kundalini must persevere in pranayama and Sexual Magic daily throughout their entire life.
The room for the practice of pranayama must not be humid, poorly ventilated, or unclean. The room should be pure, clean, and neat.
Pranayama can be practiced in the country, in the mountains, and on the shores of lakes, rivers and seas. With pranayama, we transmute the sexual energy into Christic energy.
-Samael Aun Weor, The Yellow Book