CHĀNDOGYA UPANISHAD · 5.10.1

तद् य इत्थं विदुः ।
ये चेमे ऽरण्ये श्रद्धा तप इत्य् उपासते ।
ते ऽर्चिषम् अभिसंभवन्ति ।
अर्चिषो ऽहः ।
अह्न आपूर्यमाणपक्षम् ।
आपूर्यमाणपक्षाद् यान् षड् उदङ्ङ् एति मासांस् तान् ॥

tad ya itthaṃ viduḥ ।
ye ceme ’raṇye śraddhā tapa ity upāsate ।
te ’rciṣam abhisaṃbhavanti ।
arciṣo ’haḥ ।
ahna āpūryamāṇapakṣam ।
āpūryamāṇapakṣād yān ṣaḍ udaṅṅ eti māsāṃs tān ॥

'Those who know this (even though they still be grihasthas, householders) and those who in the forest follow faith and austerities (the vânaprasthas, and of the parivrâgakas those who do not yet know the Highest Brahman) go to light (arkis), from light to day, from day to the light half of the moon, from the light half of the moon to the six months when the sun goes to the north

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)