Bhagavad Gita 18.20

सर्वभूतेषु येनैकं भावमव्यमीक्षते |
अविभक्तं विभक्तेषु तज्ज्ञानं विद्धि सात्त्विकम्

Translation

Understand that knowledge to be in the mode of goodness by which a person sees one undivided imperishable reality within all diverse living beings.