हठयोग प्रदीपिका (योगी स्वात्माराम - ज्योत्स्ना टीका सहित सटीक)

28 HAṬHAYOGAPRADĪPIKĀ
32. By Trāṭaka, all diseases of the eyes are
removed and sloth, etc. are overcome. It should be
carefully kept secret like a golden casket.
33. Then NAULI [is described]: With the shoulders
bent down, one should rotate to right and left the
stomach with the speed of a fast-circling eddy. This
is called Nauli by the Siddha-s.
34. This Nauli, the crown of Haṭha-yoga practice,
stimulates the gastric fire if dull, increases the digestive
power, produces happiness and destroys all diseases
and disorders of the humours.
35. Then KAPĀLABHĀTI [is described]: Perform
Recaka (exhalation) and Pūraka (inhalation) rapidly
like the bellows of a blacksmith. This is called Kapāla-
bhāti, and destroys phlegmatic diseases.
36. Freed from corpulence, phlegmatic disorders,
impurities, etc. by [the performance of the above]
six acts, one should practise Prāṇāyāma. Then success
[in Yoga] is achieved without strain.
37. Some teachers say that all impurities [of
the Nāḍi-s] are removed by Prāṇāyāma alone and other
acts [the above-mentioned six] are not accepted [by
them].
38. Then GAJAKARAṆĪ [is described]: [Yogin-s]
draw up the Apāna to the throat and vomit the sub-
stances [food, water, etc.] that are in the stomach.
[This act] the gradual practice of which brings all the
Nāḍi-s under control is called Gajakaraṇī by those who
know Haṭha-yoga.