Kena Upanishad Verse 1.7

Hearing is made possible by the presence of the Infinite. While sounds are heard by the ear, the Absolute itself remains beyond auditory perception. One should know the enabler of hearing to be the true Brahman.

Sanskrit Verse

यच्छ्रोत्रेण न शृणोति येन श्रोत्रमिँश्रुतम् ।
तदेव ब्रह्म त्वं विद्धि नेदं यदिदमुपासते ॥ ७ ॥

Transliteration

yacchrotreṇa na śṛṇoti yena śrotramim̐śrutam |
tadeva brahma tvaṃ viddhi nedaṃ yadidamupāsate || 7 ||

Translation

What cannot be heard with the ear, but by which the ears are able to hear, That alone know thou to be the Brahman; not this which (people) here worship.