PRAŚNA UPANISHAD · 3.8

आदित्यो ह वै बाह्यः प्राण उदयत्येष ह्येनं चाक्षुषं
प्राणमनुगृह्णानः । पृथिव्यां या देवता सैषा पुरुषस्य
अपानमवष्टभ्यान्तरा यदाकाशः स समानो वायुर्व्यानः ॥ ३.८॥

ādityo ha vai bāhyaḥ prāṇa udayatyeṣa hyenaṃ cākṣuṣaṃ
prāṇamanugṛhṇānaḥ । pṛthivyāṃ yā devatā saiṣā puruṣasya
apānamavaṣṭabhyāntarā yadākāśaḥ sa samāno vāyurvyānaḥ ॥ 3.8॥

“The Sun is the main breath outside this body, for it cherisheth the eye in its rising. The divinity in the earth, she attracteth the lower breath of man, and the ether between is the medial breath; air is the breath pervasor.

Sri Aurobindo · CWSA 18, p. 183