The Universe Vs. Brahmam – Aparokshanubhuti – Verse 45 – Adi Shankaracharya

उपादानं प्रपञ्चस्य ब्रह्मणोऽन्यन्न विद्यते।
तस्मात्सर्वप्रपञ्चोऽयं ब्रह्मैवास्ति न चेतरत्।।45।।

Upadanaṃ prapancasya brahmaṇo’nyanna vidyate.
Tasmatsarvaprapanco’yaṃ brahmaivasti na chetarat

Aparokshanubhuti – Verse 45

There exists no other material cause of this phenomenal universe except Brahman. Hence this whole universe is but Brahman and nothing else.