Chapter 4 · Knowledge and Renunciation of Action · Krishna said
Bhagavad Gita 4.35 — Seeing all in oneself
यज्ज्ञात्वा न पुनर्मोहमेवं यास्यसि पाण्डव। येन भूतान्यशेषेण द्रक्ष्यस्यात्मन्यथो मयि (var अशेषाणि) ॥
yajjñātvā na punarmohamevaṃ yāsyasi pāṇḍava | yena bhūtānyaśeṣāṇi drakṣyasyātmanyatho mayi ||
Meaning
Knowing this, Arjuna, you will not fall into such delusion again. Through it you will see all beings in yourself and then in Me.