Different Upanishads 117.5

Different Upaniṣads 117.5

etaddha sma vai tadvidvām̐ sa āhuḥ pūrve mahāśālā mahāśrotriyā
na no'dya kaścanāśrutamamatamavijñātamudāhariṣyatīti hyebhyo
vidāñcakruḥ