Matsya Purana — The Array of the Gods: Description of the Vaiṣṇava Host and the Lokapālas
उदयास्तगचक्रेण मेरुपर्वतगामिना त्रिदिवद्वारचक्रेण तपता लोकमव्ययम् //
udayāstagacakreṇa meruparvatagāminā tridivadvāracakreṇa tapatā lokamavyayam //
With the wheel of sunrise and sunset, moving along the mountain Meru, and with the wheel that passes through the gates of heaven, the Sun heats (illumines) the imperishable world.
It does not describe Pralaya directly; it emphasizes the stable, ongoing cosmic order—Sun’s cyclical motion and its sustaining heat—calling the world “avyaya” (enduring in its ordained function).
By presenting the Sun as the regulator of time and order (day/night, seasons), it implicitly grounds dharma in regularity—kings and householders align rituals, governance, and daily disciplines with the solar cycle.
Ritually, it supports solar-time observances (sandhyā, daily rites) and orientation principles: sacred layouts and temple/altar timing often follow sunrise–sunset cycles governed by Surya’s course.