Bhagavad Gita Chapter 9, Verse 17

पिताहमस्य जगतो माता धाता पितामहः | वेद्यं पवित्रमोंकार ऋक्साम यजुरेव च ||

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

I am the father of this universe, the mother, the support, and the grandsire. I am that which is to be known, the purifier, the syllable Om, the Rig Veda, the Sama Veda, and the Yajur Veda.

Krishna reveals that He is the source of everything: 'Pitāham asya jagato mātā dhātā pitāmahaḥ'—I am (aham) the father (pitā) of this universe (asya jagataḥ), the mother (mātā), the support (dhātā), and the grandsire (pitāmahaḥ). 'Vedyaṁ pavitram oṁkāra ṛk sāma yajur eva ca'—I am that which is to be known (vedyam), the purifier (pavitram), the syllable Om (oṁkāra), the Rig Veda (ṛk), the Sama Veda (sāma), and the Yajur Veda (yajuḥ). This reveals the Supreme's relationship to creation: He is the father, mother, support, grandsire—all relationships. He is the Vedas—all knowledge. He is Om—the primordial sound. He is everything that is to be known—the goal of all knowledge. This is the Supreme's completeness: He is all relationships, all knowledge, all goals.