Matsya Purana — Solar–Lunar Motions
त्रींल्लोकान्प्रति सामान्यात् सूर्यो यात्यविलम्बतः अचिरात्तु प्रकाशेन अवनात्तु रविः स्मृतः //
trīṃllokānprati sāmānyāt sūryo yātyavilambataḥ acirāttu prakāśena avanāttu raviḥ smṛtaḥ //
Because his influence is shared by the three worlds, the Sun moves without delay; and by his swift diffusion of light he is remembered as Ravi, the one who inclines beings toward activity and life.
It does not describe Pralaya directly; it emphasizes the Sun’s universal function across the three worlds—an aspect of stable cosmic order that underlies cycles of creation and dissolution.
By presenting the Sun as prompt and universally beneficial, the verse implies an ethical model: rulers and householders should act without delay in their responsibilities and provide welfare impartially, like sunlight shared across all realms.
While not a Vāstu rule itself, the verse supports ritual and temple logic that prioritizes sunlight (Surya) for auspiciousness—often reflected in east-facing orientations and practices that honor solar illumination.