प्राणं चेदिडया पिबेन्नियमितं भूयोऽन्यथा रेचयेत् पीत्वा पिङ्गलया समीरणं अथो बद्ध्वा त्यजेद्वामया । सूर्यचन्द्रमसोरनेन विधिनाभ्यासं सदा तन्वतां शुद्धा नाडिगणा भवन्ति यमिनां मासत्रयादूर्ध्वतः ॥ २.१० ॥

prāṇaṃ cediḍayā pibenniyamitaṃ bhūyo'nyathā recayet pītvā piṅgalayā samīraṇaṃ atho baddhvā tyajedvāmayā । sūryacandramasoranena vidhinābhyāsaṃ sadā tanvatāṃ śuddhā nāḍigaṇā bhavanti yamināṃ māsatrayādūrdhvataḥ ॥ 2.10 ॥

If the air was inhaled through the Ida (the left nostril), it should, after proper Kumbhaka, be released through the Pingala (right nostril), and then inhalation should happen through the Pingala (right nostril), Kumbhaka should be performed, and exhalation through the Ida (left nostril). By such practice (alternate breathing through Ida and Pingala) all of the yogi's nâdîs become clean (nadishodhana) within three months.