Bhagavad Gita 4.29

4. Wisdom in Action

अपाने जुह्वति प्राण प्राणेऽपानं तथाऽपरे। प्राणापानगती रुद्ध्वा प्राणायामपरायणाः

apāne juhvati prāṇaṁ prāṇe ’pānaṁ tathāpare prāṇāpāna-gatī ruddhvā prāṇāyāma-parāyaṇāḥ apare niyatāhārāḥ prāṇān prāṇeṣhu juhvati sarve ’pyete yajña-vido yajña-kṣhapita-kalmaṣhāḥ

Yet others pour as sacrifice the outgoing breath in the incoming, and the incoming in the outgoing, restraining the flow of the outgoing and incoming breaths, solely absorbed in the control of breathing.

source: Bhagavad-Gita · Annie Besant (1922) · Wikisource

WEBREATH — the Minute at 11:11, your own local time — we are One Breath