Bhagavad Gita Chapter 18.20
sarva-bhūteṣu yenaikaḿ
bhāvam avyayam īkṣate
avibhaktaḿ vibhakteṣu
taj jñānaḿ 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.