Bhagwad Gita
Chapter 13, Verse 31
यदा भूतपृथग्भावमेकस्थमनुपश्यति।तत एव च विस्तारं ब्रह्म सम्पद्यते तदा।।13.31।।
When a sensible man ceases to see different identities, which are due to different material bodies, he attains to the Brahman conception. Thus he sees that beings are expanded everywhere.