Bhagavad Gita 10.42

या बहुनैतेन किं ज्ञातेन तवार्जुन |
विशिष्टाभ्यहमिदं कृत्स्नमेकांशेन स्थितो जगत्

Translation

What need is there for all this detailed knowledge, O Arjun? Simply know that by one fraction of My being, I pervade and support this entire creation.