Passage
Brhadaranyaka Upanisad brhup_4,5.13
san brihadaranyaka
sa yathā saindhavaghano 'nantaro 'bāhyaḥ kṛtsno rasaghana eva / evaṃ vā are 'yam ātmānantaro 'bāhyaḥ kṛtsnaḥ prajñānaghana eva / etebhyo bhūtebhyaḥ samutthāya tāny evānuvinayati / na pretya saṃjñāstīty are bravīmi / iti hovāca yājñavalkyaḥ