Bhagwad Gita
Chapter 9, Verse 17
पिताऽहमस्य जगतो माता धाता पितामहः।
वेद्यं पवित्रमोंकार ऋक् साम यजुरेव च।।9.17।।
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 Rk, the Sama, and the Yajur [Vedas].