Bhagavad Gita · 11.7

इहैकस्थं जगत्कृत्स्नं पश्याद्य सचराचरम्।मम देहे गुडाकेश यच्चान्यद् द्रष्टुमिच्छसि॥

ihaika-sthaṁ jagat kṛtsnaṁ paśhyādya sa-charācharam mama dehe guḍākeśha yach chānyad draṣhṭum ichchhasi

Behold now the entire universe — moving and non-moving — standing as one within my body, O conqueror of sleep, and whatever else you wish to see.

— Bhagavad Gita 11.7

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)