पिताऽहमस्य जगतो माता धाता पितामहः। वेद्यं पवित्रमोंकार ऋक् साम यजुरेव च ॥

pitāham asya jagato mātā dhātā pitāmahaḥ vedyaṁ pavitram oṁkāra ṛik sāma yajur eva cha

I the Father of this universe, the Mother, the Supporter, the Grandsire, the Holy one to be known, the Word of Power, and also the Rik, Sâma, and Yajur,

In plain words: Krishna says he is the father, the mother, the supporter and the grandfather of the universe. He is the holy one to be known, the sacred sound Om, and the three ancient holy books called the Rig, Sama and Yajur Vedas.