Chāndogya Upaniṣad 4.13

4.13.1

atha hainam āhavanīyo 'nuśaśāsa prāṇa ākāśo dyaur vidyud iti \
ya eṣa vidyuti puruṣo dṛśyate so 'ham asmi sa eva aham asmi iti \\413.1\

1. So then the eastern (Āhavanīya) fire instructed him: 'Breath, space, sky, lightning [are forms of me. But] the Person who is seen in the lightning—I am he; I am he indeed!' 2. [Chorus of the fires :] ‘He who knows and reverences this fire thus, repels evil-doing from himself, becomes possessor of a world, reaches a full length of life, lives long. His descendants do not become destroyed. Both in this world and in the yonder we serve him who knows and reverences this fire thus.’

4.13.2

sa ya etam evaṃ vidvān upāste \
apahate pāpakṛtyām \
lokī bhavati \
sarvam ayur eti \
jyog jīvati \
na asya avarapuruṣāḥ kṣīyante \
upa vayaṃ taṃ bhuñjāmo 'smiṃś ca loke amuṣmiṃś ca \
ya etam evaṃ vidvān upāste \\413.2\