BṚHADĀRAṆYAKA UPANISHAD · 3.1.5

याज्ञवल्क्येति होवाच -- यद् इदं सर्वं पूर्वपक्षापरपक्षाभ्याम् आप्तं सर्वं पूर्वपक्षापरपक्षाभ्याम् अभिपन्नं केन यजमानः पूर्वपक्षापरपक्षयोर् आप्तिम् अतिमुच्यत इति ।
उद्गात्रर्त्विजा वयुना प्राणेन ।
प्राणो वै यज्ञस्योद्गाता ।
तद् यो ऽयं प्राणः स वायुः स उद्गाता ।
स मुक्तिः सातिमुक्तिः ॥

yājñavalkyeti hovāca -- yad idaṃ sarvaṃ pūrvapakṣāparapakṣābhyām āptaṃ sarvaṃ pūrvapakṣāparapakṣābhyām abhipannaṃ kena yajamānaḥ pūrvapakṣāparapakṣayor āptim atimucyata iti ।
udgātrartvijā vayunā prāṇena ।
prāṇo vai yajñasyodgātā ।
tad yo ’yaṃ prāṇaḥ sa vāyuḥ sa udgātā ।
sa muktiḥ sātimuktiḥ ॥

'Yâgñavalkya,' he said, 'everything here is reached by the waxing and waning of the moon, everything is overcome by the waxing and waning of the moon. By what means then is the sacrificer freed beyond the reach of the waxing and waning of the moon?' Yâgñavalkya said: 'By the Udgâtri priest, who is Vâyu (the wind), who is the breath. For the breath is the Udgâtri of the sacrifice, and the breath is the wind, and he is the Udgâtri. This constitutes freedom, and perfect freedom.'

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)