हठयोग प्रदीपिका (योगी स्वात्माराम - ज्योत्स्ना टीका सहित सटीक)

HAṬHAYOGAPRADĪPIKĀ 41
here and that the contraction effected by the tongue
pressed against [the root of] the front-teeth (Jihvā-
bandha) is preferable.
23. This [Jihvā-bandha in the course of the
Māha-bandha] stops the upward course [of the Prāṇa]
through all the Nāḍi-s [except the Suṣumnā]. This
Mahā-bandha [helps to] confer great siddhi-s.
24. This is efficacious in freeing one from the
great noose of Time (Yama). It brings about the
union of the three streams [i.e. Nāḍi-s: Iḍā, Piṅgalā
and Suṣumnā]. It enables the mind to reach Kedāra
[the sacred seat of Śiva in the mystic centre between
the eyebrows].
25. As a woman endowed with beauty and charm
is unfruitful without a husband, so are Mahā-mudrā
and Mahā-bandha without the Mahā-vedha.
26. The MAHĀ-VEDHA [is described]: The Yogin,
assuming the Mahā-bandha, should draw in the breath
with concentrated mind and stop the [upward and down-
ward] course of the Prāṇa, etc. by the Jālaṃdhara-
bandha.
27. Placing the two palms straight upon the
ground, he should strike [the ground] slowly with the
buttocks. [Then] the Prāṇa, leaving the two Nāḍī-s
[Iḍā and Piṅgalā] courses through the middle
[Suṣumnā].
28. Then takes place the union of the Moon,
Sun and Fire (Iḍā, Piṅgalā and Suṣumnā) that surely
leads to immortality. There is a death-like state;
then the air should be exhaled [slowly].