Bhagavad Gita 9.17
I am the Father of the universe, its Mother, Nourisher, and Grandfather; I am the Knowable and the Pure; I am Om, and I am the Sacred Scriptures.
पिताऽहमस्य जगतो माता धाता पितामहः।
वेद्यं पवित्रमोंकार ऋक् साम यजुरेव च॥pitā'hamasya jagato mātā dhātā pitāmahaḥ|
vedyaṃ pavitramoṃkāra ṛk sāma yajureva ca||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).