Chandogya Upanishad 5.13

atha hovāca satyayajñaṃ pauluṣim prācīnayogya kaṃ tvam ātmānam upāssa iti ādityam eva bhagavo rājann iti hovāca eṣa vai viśvarūpa ātmā vaiśvānaro yaṃ tvam ātmānam upāste tasmāt tava bahu viśvarūpaṃ kule dṛśyate

Then he said to Satyayagña Paulushi: 'O Prâkînayogya, whom do you meditate on as the Self?' He replied: 'The sun only, venerable king.' He said: 'The Self which you meditate on is the Vaisvânara Self, called Visvarûpa (multiform). Therefore much and manifold wealth is seen in your house.

pravṛtto 'śvatarīratho dāsī niṣkaḥ atsy annaṃ paśyasi priyam atty annaṃ paśyati priyaṃ bhavaty asya brahmavarcasaṃ kule ya etam evam ātmānaṃ vaiśvānaram upāste cakṣuṣ ṭv etad ātmana iti hovāca andho 'bhaviṣyo yan māṃ nāgamiṣya iti

'There is a car with mules, full of slaves and jewels. You eat food and see your desire, and whoever thus meditates on that Vaisvânara Self, eats food and sees his desire, and has Vedic glory in his house. 'That, however, is but the eye of the Self, and you would have become blind, if you had not come to me.'