Bhagavad-gītā 18.20
BG 18.20
Open the full passageसर्वभूतेषु येनैकं भावमव्ययमीक्षते । अविभक्तं विभक्तेषु तज्ज्ञानं विद्धि सात्त्विकम् ॥२०॥
Sanskrit
sarva-bhūteṣu yenaikaṁ bhāvam avyayam īkṣate avibhaktaṁ vibhakteṣu taj jñānaṁ viddhi sāttvikam
Translation
That knowledge by which one undivided spiritual nature is seen in all living entities, though they are divided into innumerable forms, you should understand to be in the mode of goodness.