अधोलोकवर्णनम् (Adholoka-varṇana) — Description of the Lower Worlds and Cosmographic Measures
उभयोः काष्ठयोर्मध्ये भ्रमते मण्डलानि सः / दिवानक्तं च सूर्यस्य मन्दा शीघ्रा च वै गातिः
ubhayoḥ kāṣṭhayormadhye bhramate maṇḍalāni saḥ / divānaktaṃ ca sūryasya mandā śīghrā ca vai gātiḥ
Between the two kāṣṭhas he sets the circles in motion. The Sun’s course, by day and by night, is indeed sometimes slow and sometimes swift.