pitāham asya jagato mātā dhātā pitāmahaḥ vedyaṁ pavitram oṁkāra ṛk sāma yajur eva ca

pitaham asya jagato
mata dhata pitamahah
vedyam pavitram omkara
rk sama yajur eva ca
"I am the father of this universe, the mother, the support, and the grandsire. I am the object of knowledge, the purifier and the syllable om. I am also the Rg-veda, Sama-veda and Yajur-veda."
Similarly, the transcendental sound om is further explained in Bhagavad-gita, Chapter Seventeen, verse twenty-three:
 

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