Matsya Purana — The Strategy to Defeat Tāraka: Pārvatī’s Birth
ततो गतेषु देवेषु ब्रह्मा लोकपितामहः निशां सस्मार भगवान् स्वतनोः पूर्वसंभवाम् //
tato gateṣu deveṣu brahmā lokapitāmahaḥ niśāṃ sasmāra bhagavān svatanoḥ pūrvasaṃbhavām //
Then, when the gods had departed, Brahmā—the Pitāmaha, grandsire and father of the worlds—remembered the cosmic Night, and with it the former manifestation that had arisen from his own body.
It points to cyclical cosmology: after divine activity subsides, Brahmā recalls the ‘cosmic night’ and prior emanations, implying recurring phases of manifestation and withdrawal (pratisarga/pralaya-like rhythm).
Indirectly, it reinforces the Purāṇic ethic of periodic reflection and restraint: just as cosmic activity has its ‘night,’ rulers and householders are urged to observe disciplined pauses (self-review, austerity, ritual regularity) within worldly action.
No direct Vāstu or temple rule is stated; the ritual takeaway is the emphasis on cosmic time (night/day cycles) that underlies calendrical planning for rites—an idea often used when aligning sacrifices, vows, and consecrations with auspicious temporal divisions.