Passage
Taittiriya Upanisad TaittU_2,8.1
san taittiriya
bhīṣāsmādvātaḥ pavate bhīṣodeti sūryaḥ / bhīṣāsmādagniścendraśca mṛtyurdhāvati pañcama iti / saiṣānandasya mīmāṃsā bhavati / yuvā syāt sādhuyuvādhyāyakaḥ āśiṣṭho dṛḍhiṣṭho baliṣṭhaḥ / tasyeyaṃ pṛthivī sarvā vittasya pūrṇā syāt / sa eko mānuṣa ānandaḥ / te ye śataṃ mānuṣā ānandāḥ