MuU 1.2.11
तपःश्रद्धे ये ह्युपवसन्त्यरण्ये शान्ता विद्वांसो भैक्ष्यचर्यां चरन्तः । सूर्यद्वारेण ते विरजाः प्रयान्ति यत्रामृतः स पुरुषो ह्यव्ययात्मा
tapaḥśraddhe ye hyupavasantyaraṇye śāntā vidvāṃso bhaikṣyacaryāṃ carantaḥ | sūryadvāreṇa te virajāḥ prayānti yatrāmṛtaḥ sa puruṣo hyavyayātmā
Sanskrit for this text is pending; the English follows the translator's numbering.
But those who practise penance and faith in the forest, tranquil, wise, and living on alms, depart free from passion through the sun to where that immortal Person dwells whose nature is imperishable.
Translated by F. Max Müller