Chandogya Upanishad 6.10.2

6.10.2

evam eva khalu somyemāḥ sarvāḥ prajāḥ sata āgamya na viduḥ sata āgacchāmaha iti \
ta iha vyāghro vā siṃho vā vṛko vā varāho vā kīṭo vā pataṅgo vā daṃśo vā maśako vā yad yad bhavanti tad ābhavanti \\610.2\

wolf, or boar, or worm, or fly, or gnat, or mosquito, that they become.

1. ‘These rivers, my dear, flow, the eastern toward the east, the western toward the west. They go just from the ocean to the ocean. They become the ocean itself. As there they know not “I am this one,” “I am that one”— even so, indeed, my dear, all creatures here, though they have come forth from Being, know not “We have come forth from Being.” Whatever they are in this world, whether tiger, or lion, or