Chapter 11 · verse 13 · gita.yoga.org
Bhagavad Gita 11.13
तत्रैकस्थं जगत्कृत्स्नं प्रविभक्तमनेकधा। अपश्यद्देवदेवस्य शरीरे पाण्डवस्तदा
There, in the body of the God of gods, Arjuna then saw the entire universe resting in one, with its myriad of divisions.