ŚVETĀŚVATARA UPANISHAD · 3.9

यस्मात् परं नापरम् अस्ति किंचिद् यस्मान् नाणीयो न ज्यायो ऽस्ति किंचित् ।
वृक्ष इव स्तब्धो दिवि तिष्ठत्य् एकस् तेनेदं पूर्णं पुरुषेण सर्वम् ॥

yasmāt paraṃ nāparam asti kiṃcid yasmān nāṇīyo na jyāyo ’sti kiṃcit ।
vṛkṣa iva stabdho divi tiṣṭhaty ekas tenedaṃ pūrṇaṃ puruṣeṇa sarvam ॥

This whole universe is filled by this person (purusha), to whom there is nothing superior, from whom there is nothing different, than whom there is nothing smaller or larger, who stands alone, fixed like a tree in the sky.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)