Different Upanishads 161.9

Different Upaniṣads 161.9

sa yathā śaṅkhasya dhmāyamānasya na bāhyāñchabdāñchaknuyād
grahaṇāya śaṅkhasya tu grahaṇena śaṅkhadhmasya vā śabdo
gṛhītaḥ