My dear Lord, You alone manifest Yourself as the entire cosmic manifestation, for You existed before the creation, You exist after the annihilation, and You are the maintainer between the beginning and the end. All this is done by Your external energy through actions and reactions of the three modes of material nature. Therefore whatever exists — externally and internally — is You alone.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
एकस्त्वमेव जगदेतममुष्य यत्त्व- माद्यन्तयोः पृथगवस्यसि मध्यतश्च । सृष्ट्वा गुणव्यतिकरं निजमाययेदं नानेव तैरवसितस्तदनुप्रविष्टः
ekastvameva jagadetamamuṣya yattva- mādyantayoḥ pṛthagavasyasi madhyataśca | sṛṣṭvā guṇavyatikaraṃ nijamāyayedaṃ nāneva tairavasitastadanupraviṣṭaḥ
SB 7.9.30