Chapter 13 · verse 31 · gita.yoga.org

Bhagavad Gita 13.31

यदा भूतपृथग्भावमेकस्थमनुपश्यति।तत एव च विस्तारं ब्रह्म सम्पद्यते तदा

When a person sees all beings as resting in the One and emanating from the One alone, they then become Brahman.