And other works also which require strength, such as the kindling of fire by rubbing, running a race and stringing a strong bow, are performed without breathing out or breathing in. Therefore one should meditate on the Udgitha as the vyana.
Sama Veda, Chandogya Upanishad I, III – Meditation on the Udgitha as the Sun and the Vyana, 5
One should meditate on the letters of the word Udgitha (i.e. ut, gi and tha). Ut is the prana, for a man rises (uttishthati) by means of the prana. Gi is speech, for speeches are called girah. Tha is food, for all this subsists (sthita) on food.
Sama Veda, Chandogya Upanishad I, III – Meditation on the Udgitha as the Sun and the Vyana, 6
Ut is heaven, gi the mid-region and tha the earth. Ut is the sun, gi the air and tha fire. Ut is the Sama-Veda, gi the Yajur-Veda and tha the Rig-Veda. To him who thus meditates speech yields milk and milk is speech. He who knows this and meditates on the letters of the Udgitha becomes the possessor of food and the eater of food.
Sama Veda, Chandogya Upanishad I, III – Meditation on the Udgitha as the Sun and the Vyana, 7
At first was neither Being nor Nonbeing. There was not air nor yet sky beyond. What was its wrapping? Where? In whose protection? Was Water there, unfathomable and deep?
Rig Veda X, 129, 1
There was no death then, nor yet deathlessness; of night or day there was not any sign. The One breathed without breath, by its own impulse. Other than that was nothing else at all.
Rig Veda X, 129, 2
