Kena Upanishad 1.8

यच्छ्रोत्रेण न शृणोति येन श्रोत्रमिदꣳ श्रुतम् | तदेव ब्रह्म त्वं विद्धि नेदं यदिदमुपासते ॥

yach chrotrena na shrinoti yena shrotram idam shrutam | tad eva brahma tvam viddhi nedam yad idam upasate ||

That which is not heard by the ear, but by which the ear hears — know that alone as Brahman, not this which people worship here.

जो कान से सुना नहीं जाता, परन्तु जिसके द्वारा यह कान सुना जाता है — उसी को तू ब्रह्म जान; वह नहीं जिसकी लोग यहाँ उपासना करते हैं।