Kaushitaki Upanishad 4.6

4.6.1

sa hovāca bālākir ya evaiṣa stanayitnau puruṣas tam evāham upāsa iti /

6. Then said Bālāki: 'Him who is this person in thunder—him indeed I reverence.' To him then Ajātaśatru said: 'Make me not to converse on him! As the soul of Sound—thus, verily, I reverence him.' He then who reverences him thus, becomes the soul of sound.

4.6.2

taṃ hovācājātaśatrur mā maitasmin saṃvādayiṣṭhāḥ /

4.6.3

śabdasyātmeti vā aham etam upāsa iti /

4.6.4

sa yo haitam evam upāste śabdasyātmā bhavati //6//