Passage
Taittiriya Upanisad TaittU_2,5.1
san taittiriya
vijñānaṃ yajñaṃ tanute karmāṇi tanute 'pi ca / vijñānaṃ devāḥ sarve brahma jyeṣṭhamupāsate / vijñānaṃ brahma ced veda tasmāccenna pramādyati / śarīre pāpmano hitvā sarvānkāmānsamaśnuta iti / tasyaiṣa eva śārīra ātmā yaḥ pūrvasya / tasmādvā etasmādvijñānamayāt anyo 'ntara ātmānandamayaḥ / tenaiṣa pūrṇaḥ / sa vā eṣa puruṣavidha eva / tasya puruṣavidhatām anvayaṃ puruṣavidhaḥ / tasya priyameva śiraḥ / modo dakṣiṇaḥ pakṣaḥ / pramoda uttaraḥ pakṣaḥ / ānanda ātmā / brahma pucchaṃ pratiṣṭhā / tadapyeṣa śloko bhavati