अधोलोकवर्णनम् (Adholoka-varṇana) — Description of the Lower Worlds and Cosmographic Measures
शरद्वसंतयोर्मध्यं विषुवत्परिभाव्यते / अहोरात्रे कलाश्चैव समं सोमः समश्नुते
śaradvasaṃtayormadhyaṃ viṣuvatparibhāvyate / ahorātre kalāścaiva samaṃ somaḥ samaśnute
The middle between śarad and vasantā is contemplated as viṣuvat. Then the portions of day and night are equal, and Soma—the Moon—likewise partakes of that balance.