Kauṣītaki Upaniṣad 3.2.5

3.2.5

jarāvyādhyādinā pañcaladuḥkhaṃ prāpto mariṣyanmaraṇaṃ kariṣyan āsannamaraṇa dūtyarthaḥ, ābalyamabalasya durbalasya bhāva ābalyaṃ hastapādādyavannalamityarthaḥ, nyetya nitarāmāgatya mohaṃ bandvādyaparijñānalakṣaṇaṃ nyeti nitarāmāgacchati, tat tadāṅgaḥ samīpasthāḥ kathayanti | samīpasthoktimāha, udakramīt utkramaṇamakaroccittaṃ manaḥ | cittotkramaṇe liṅgānyāhaḥ na śṛṇoti na paśyati na vācā vadati na dhyāyati spaṣṭaṃ, dūtyanena prakāreṇāṅgarityanvayaḥ| athāsmin prāṇa evaikadhā bhavati tadenaṃ vāk sarvaiḥ nāmabhiḥ sahāpyeti cakṣuḥ sarvaiḥ rūpaiḥ sahāpyeti śrotraṃ sarvaiḥ śabdaiḥ sahāpyeti manaḥ sarvairdhyānaiḥ sahāpyeti sa yadā pratibudhyate yathāgnerjvalataḥ sarvā diśo visphuliṅgā vipratiṣṭheran evamevaitasmādātmanaḥ