Chāndogya Upaniṣad 7.15.1

7.15.1

prāṇo vāva āśāyā bhūyān \
yathā vā arā nābhau samarpitā evam asmin prāṇe sarvaṃ samarpitam \
prāṇaḥ prāṇena yāti \
prāṇaḥ prāṇaṃ dadāti \
prāṇāya dadāti \
prāṇo ha pitā \
prāṇo mātā \
prāṇo bhrātā \
prāṇaḥ svasā \
prāṇa ācāryaḥ \
prāṇo brāhmaṇaḥ \\715.1\

1. ‘Life (prāṇa, breath), verily, is more than Hope. Just as, verily, the spokes are fastened in the hub, so on this vital breath everything is fastened. Life (prāṇa) goes on with vital breath (prāṇa). Vital breath (prāṇa) gives life (prāṇa); it gives [life] to a living creature (prāṇa). One’s father is vital breath; one’s mother, vital breath; one’s brother, vital breath; one’s sister, vital breath; one’s teacher (ācārya), vital breath; a Brahman is vital breath.