Chapter 6 · The Yoga of Meditation · Krishna said
Bhagavad Gita 6.29 — One Self in all
सर्वभूतस्थमात्मानं सर्वभूतानि चात्मनि। ईक्षते योगयुक्तात्मा सर्वत्र समदर्शनः ॥
sarvabhūtasthamātmānaṃ sarvabhūtāni cātmani | īkṣate yogayuktātmā sarvatra samadarśanaḥ ||
Meaning
One united in yoga, seeing equally everywhere, sees the Self in all beings and all beings in the Self.