Matsya Purana — Dhruva as Cosmic Pivot: Motions of Sun–Moon–Planets
आकृष्येते यदा ते तु ध्रुवेण समधिष्ठिते तदा सो ऽभ्यन्तरे सूर्यो भ्रमते मण्डलानि तु //
ākṛṣyete yadā te tu dhruveṇa samadhiṣṭhite tadā so 'bhyantare sūryo bhramate maṇḍalāni tu //
When those maṇḍalas are drawn in and held firmly by Dhruva as their support, then within that system the Sun moves, revolving through its circular courses.
It does not describe Pralaya directly; it presents a cosmological model in which Dhruva functions as a stabilizing pivot and the Sun’s motion is explained as circulation within ordered celestial “maṇḍalas.”
Indirectly, it supports the Purāṇic ideal that rulers and householders should align life with cosmic order (ṛta/dharma): just as the Sun follows fixed courses supported by Dhruva, human conduct is to be steady, regulated, and centered on a firm moral ‘pivot.’
No explicit Vāstu rule is stated, but the imagery of a fixed axis (Dhruva) and circular courses (maṇḍalas) parallels ritual/temple planning ideas like axial alignment and concentric layouts used in mandala-based sacred design.