Mahabharata 6.30.25

धूमो रात्रिस्तथा कृष्णः षण्मासा दक्षिणायनम्तत्र चान्द्रमसं ज्योतिर्योगी प्राप्य निवर्तते

dhūmo rātristathā kṛṣṇaḥ ṣaṇmāsā dakṣiṇāyanamtatra cāndramasaṃ jyotiryogī prāpya nivartate

Our plain-language meaning of this verse is waiting for scholar review.