Srimad Bhagavatam Canto 12, Chapter 06, Text 40-41


SB 12.6.40-41

srnoti ya imam sphotam
 supta-srotre ca sunya-drk
yena vag vyajyate yasya
 vyaktir akasa atmanah
sva-dhamno brahmanah saksad
 vacakah paramatmanah
sa sarva-mantropanisad
 veda-bijam sanatanam
This omkara, ultimately nonmaterial and imperceptible, is heard by the Supersoul without His possessing material ears or any other material senses. The entire expanse of Vedic sound is elaborated from omkara, which appears from the soul, within the sky of the heart. It is the direct designation of the self-originating Absolute Truth, the Supersoul, and is the secret essence and eternal seed of all Vedic hymns.
The senses of a sleeping person do not function until he has awakened. Therefore, when a sleeping person is awakened by a noise, one may ask, “Who heard the noise?” The words supta-srotre in this verse indicate that the Supreme Lord within the heart hears the sound and awakens the sleeping living entities. The Lord’s sensory activities always function on a superior level. Ultimately, all sounds vibrate within the sky, and in the internal region of the heart there is a type of sky meant for the vibration of Vedic sounds. The seed, or source, of all Vedic sounds is the omkara. This is confirmed by the Vedic statement om ity etad brahmano nedistham nama. The full elaboration of the Vedic seed sound is Srimad-Bhagavatam, the greatest Vedic literature.
Srimad Bhagavatam Canto 12, Chapter 06, Text 39
Srimad Bhagavatam Canto 12, Chapter 06, Text 42