Matsya Purana — The Madana-Dvādaśī Vow and the Birth of the Maruts
दितेश्छिद्रान्तरप्रेप्सुर् अभवत्पाकशासनः विनीतो ऽभवद् अव्यग्रः प्रशान्तवदनो बहिः //
diteśchidrāntaraprepsur abhavatpākaśāsanaḥ vinīto 'bhavad avyagraḥ praśāntavadano bahiḥ //
Seeking an opening—a vulnerable lapse—in Diti, Pākaśāsana (Indra) became outwardly humble: unhurried, undistracted, and with a calm face in appearance.
This verse does not describe Pralaya directly; it illustrates a Puranic moral-psychological theme—how subtle lapses (chidra) become decisive—often used in the wider Matsya Purana narrative world that also contains Pralaya teachings.
It highlights disciplined self-presentation and constant attentiveness: a ruler or householder should remain calm and courteous outwardly while staying inwardly vigilant against lapses that can undermine vows, security, or dharma.
No Vāstu or temple-ritual rule is stated here; the technical takeaway is the concept of avoiding “chidra” (defect/opening), a principle that later parallels ritual and architectural insistence on flawlessness, though this verse itself is ethical-strategic.