Chandogya Upanishad 5.14.1

5.14.1

atha hovācendradyumnaṃ bhāllaveyam \
vaiyāghrapadya kaṃ tvam ātmānam upāssa iti \
vāyum eva bhagavo rājann iti hovāca \
eṣa vai pṛthagvartmātmā vaiśvānaro yaṃ tvam ātmānam upāsse \
tasmāt tvāṃ pṛthag balaya āyanti pṛthag rathaśreṇayo 'nuyanti \\514.1\

Then the king said to Indradyumna Bhāllaveya, 'O descendant of Vyāghrapada, what is that Ātman on which you meditate?' He replied, 'Air only, O venerable king.' The king said, 'This that you meditate upon as Ātman is the Vaiśvānara Ātman known as "the diversely coursed". Therefore from diverse directions offerings come to you, and various rows of chariots follow you.