CHĀNDOGYA UPANISHAD · 2.21.2
स य एवम् एतत् साम सर्वस्मिन् प्रोतं वेद सर्वं ह भवति ॥
sa ya evam etat sāma sarvasmin protaṃ veda sarvaṃ ha bhavati ॥
He who thus knows this Sâman, as interwoven in everything, he becomes everything.
F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)