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].