Bhagavad Gita 11.13 Chapter 11, Verse 13

तत्रैकस्थं जगत्कृत्स्नं प्रविभक्तमनेकधा ।
अपश्यद्देवदेवस्य शरीरे पाण्डवस्तदा ॥११.१३॥

tatraikasthaṃ jagatkṛtsnaṃ pravibhaktamanekadhā
apaśyaddevadevasya śarīre pāṇḍavastadā

Meaning

There, in the body of the God of gods, Arjuna then saw the whole universe, with its many divisions, gathered in one place.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 11.13 (Chapter 11, The Vision of the Universal Form, Verse 13)