CHĀNDOGYA UPANISHAD · 6.1.5

यथा सोम्यैकेन लोहमणिना सर्वं लोहमयं विज्ञातं स्यात् ।
वाचारम्भणं विकारो नामधेयं लोहम् इत्य् एव सत्यम् ॥

yathā somyaikena lohamaṇinā sarvaṃ lohamayaṃ vijñātaṃ syāt ।
vācārambhaṇaṃ vikāro nāmadheyaṃ loham ity eva satyam ॥

'And as, my dear, by one nugget of gold all that is made of gold is known, the difference being only a name, arising from speech, but the truth being that all is gold?

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)