Bhagavad Gita 10.42 Chapter 10, Verse 42

अथवा बहुनैतेन किं ज्ञातेन तवार्जुन ।
विष्टभ्याहमिदं कृत्स्नमेकांशेन स्थितो जगत् ॥१०.४२॥

athavā bahunaitena kiṃ jñātena tavārjuna
viṣṭabhyāhamidaṃ kṛtsnamekāṃśena sthito jagat

Meaning

But what need is there, Arjuna, for all this detailed knowledge? I stand, supporting this entire universe with a single fragment of myself.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 10.42 (Chapter 10, The Yoga of Divine Glories (Vibhuti Yoga), Verse 42)