Chapter 8 - Verse 25

धूमो रात्रिस्तथा कृष्णः षण्मासा दक्षिणायनम् ।
तत्र चान्द्रमसं ज्योतिर्योगी प्राप्य निवर्तते ॥ २५ ॥

dhūmo rātristathā kṛṣṇaḥ ṣaṇmāsā dakṣiṇāyanam .
tatra cāndramasaṃ jyotiryogī prāpya nivartate .. 25 ..


Smoke, night-time, and the dark fortnight, the six months of the southern solstice,—attaining by these to the lunar light, the Yogin returns.
Read the commentary
‘Smoke,’ ’night time,’ the ‘dark fortnight,’ and the ‘six months of the southern solstice,’ are all deities presiding over smoke and periods of time spoken of. By this path, the Yogin—the Karmin who performs sacrifices (to Gods) and other works—attains to the lunar light, and on the exhaustion thereof, returns again to earth.