CHĀNDOGYA UPANISHAD · 6.9.2

ते यथा तत्र न विवेकं लभन्ते ऽमुष्याहं वृक्षस्य रसो ऽस्म्य् अमुष्याहं वृक्षस्य रसो ऽस्मीति ।
एवम् एव खलु सोम्येमाः सर्वाः प्रजाः सति संपद्य न विदुः सति संपद्यामह इति ॥

te yathā tatra na vivekaṃ labhante ’muṣyāhaṃ vṛkṣasya raso ’smy amuṣyāhaṃ vṛkṣasya raso ’smīti ।
evam eva khalu somyemāḥ sarvāḥ prajāḥ sati saṃpadya na viduḥ sati saṃpadyāmaha iti ॥

'And as these juices have no discrimination, so that they might say, I am the juice of this tree or that, in the same manner, my son, all these creatures, when they have become merged in the True (either in deep sleep or in death), know not that they are merged in the True.

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