The Upanishads - Mandhata Global

Then he said to Uddalaka the son of Aruna: "O
Gautama, whom do you meditate on as the Self?" "The
earth only, venerable King," he replied. "The Self you
meditate on," said the king, "is the Vaisvanara Self
called Pratishtha (the support). Therefore you are
supported by offspring and cattle and you eat food and
see what is pleasing. Whoever thus meditates on the
Vaisvanara Self eats food, sees what is pleasing and has
in his family the glory of Brahman. That, however, is
only the feet of the Self. Surely your feet would have
withered away if you had not come to me."
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Chapter XVIII
The Vaisvanara Self as the Whole
549