Chandogya Upanishad
Prapathaka V, Khanda 14
Then he said to Indradyumna Bhâllaveya: 'O Vaiyâghrapadya, whom do you meditate on as the Self?' He replied: 'Air only, venerable king.' He said: 'The Self which you meditate on is the Vaisvânara Self, called Prithagvartman (having various courses). Therefore offerings come to you in various ways, and rows of cars follow you in various ways.