Priyavrata-vaṃśa and Saptadvīpa Vibhāga (प्रियव्रतवंशः सप्तद्वीपविभागश्च)
उष्णस्योष्णः स्मृतो देशः पावनस्यापि पावनः / अन्धकारस्य देशस्तु आन्धकारः प्रकीर्त्तितः
uṣṇasyoṣṇaḥ smṛto deśaḥ pāvanasyāpi pāvanaḥ / andhakārasya deśastu āndhakāraḥ prakīrttitaḥ
The land of heat is remembered as heat itself; the land of the purifying is likewise purifying. But the land of darkness is proclaimed as Āndhakāra.