विधिवत्प्राणसंयामैर्नाडीचक्रे विशोधिते । सुषुम्णावदनं भित्त्वा सुखाद्विशति मारुतः ॥ २.४१ ॥

vidhivatprāṇasaṃyāmairnāḍīcakre viśodhite । suṣumṇāvadanaṃ bhittvā sukhādviśati mārutaḥ ॥ 2.41 ॥

By maintaining the systematic practice of pránayama, the Nâdi chakras becomes clear of impurities, and prána vayu, breaking through the opening of the Sushumnâ, enters it easily.