Bhagavad-gītā 4.29
BG 4.29
Open the full passageअपाने जुह्वति प्राणं प्राणेऽपानं तथापरे । प्राणापानगती रुद्ध्वा प्राणायामपरायणाः । अपरे नियताहाराः प्राणान्प्राणेषु जुह्वति ॥२९॥
Sanskrit
apāne juhvati prāṇaṁ prāṇe 'pānaṁ tathāpare prāṇāpāna-gatī ruddhvā prāṇāyāma-parāyaṇāḥ apare niyatāhārāḥ prāṇān prāṇeṣu juhvati
Translation
Still others, who are inclined to the process of breath restraint to remain in trance, practice by offering the movement of the outgoing breath into the incoming, and the incoming breath into the outgoing, and thus at last remain in trance, stopping all breathing. Others, curtailing the eating process, offer the outgoing breath into itself as a sacrifice.