BṚHADĀRAṆYAKA UPANISHAD · 4.3.25

यद् वै तन् न रसयति रसयन् वै तन् न रसयति ।
न हि रसयितू रसयतेर् विपरिलोपो विद्यते ऽविनाशित्वात् ।
न तु तद् द्वितीयम् अस्ति ततो ऽन्यद् विभक्तं यद् रसयेत् ॥

yad vai tan na rasayati rasayan vai tan na rasayati ।
na hi rasayitū rasayater viparilopo vidyate ’vināśitvāt ।
na tu tad dvitīyam asti tato ’nyad vibhaktaṃ yad rasayet ॥

'And when (it is said that) there (in the Sushupti) he does not taste, yet he is tasting, though he does not taste. For tasting is inseparable from the taster, because it cannot perish. But there is then no second, nothing else different from him that he could taste.

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