Chāndogya Upaniṣad 8.1.5

8.1.5

sa brūyāt \
nāsya jarayaitaj jīryati na vadhenāsya hanyate \
etat satyaṃ brahmapuram asmin kāmāḥ samāhitāḥ \
eṣa ātmāpahatapāpmā vijaro vimṛtyur viśoko vijighatso 'pipāsaḥ satyakāmaḥ satyasaṃkalpaḥ \
yathā hy eveha prajā anvāviśanti yathānuśāsanam \
yaṃ yam antam abhikāmā bhavanti yaṃ janapadaṃ yaṃ kṣetrabhāgaṃ taṃ tam evopajīvanti \\801.5\

For, just as here on earth human beings follow along in subjection to command; of whatever object they are desirous, whether a realm or a part of a field, upon that they live dependent—

4. If they should say to him: ‘If within this city of Brahma is contained everything here, all beings as well as all desires, when old age overtakes it or it perishes, what is left over therefrom?’ he should say: ‘That does not grow old with one’s old age; it is not slain with one’s murder. That is the real city of Brahma. In it desires are contained. That is the Soul (Ātman), free from evil, ageless, deathless, sorrowless, hungerless, thirstless, whose desire is the Real, whose conception is the Real.