Passage
Brhadaranyaka Upanisad brhup_3,7.15
san brihadaranyaka
athādhibhūtam / yaḥ sarveṣu bhūteṣu tiṣṭhan sarvebhyo bhūtebhyo 'ntaro yaṃ sarvāṇi bhūtāni na vidur yasya sarvāṇi bhūtāni śarīraṃ yaḥ sarvāṇi bhūtāny antaro yamayaty eṣa ta ātmāntaryāmy amṛtaḥ / ity adhibhūtam