Subala Upanishad 5.p4

5.p4

jihvādhyātmaṃ rasayitavyamadhibhūtaṃ varuṇastatrādhidaivataṃ nāḍī teṣāṃ nibandhanaṃ yastvaci yaḥ sparśayitavye yo varuṇe yo nāḍyāṃ yaḥ prāṇe yo vijñāne ya ānande yo hṛdyākāśe ya etasminsarvasminnantare saṃcarati so'yamātmā tamātmānamupāsītājaramamamṛtamabhayamaśokamanantam ||

"The tongue is adhyāṭma: the tastable aḍhibhūṭa, and Varuṇa is aḍhiḍaivaṭa. The nādis bind them. He who moves in the tongue, the tastable, Varuṇa, the nādis, prāṇa, vijñāna, ānanḍa, the ākaś of the heart, and within all else—That is Āṭmā. It is that which should be worshipped. It is without old age, death, fear, sorrow, or end.