Matsya Purana — War of Devas and Dānavas: Yama and Kubera Defeated; Kālanemi’s Māyā and the A...
देवानां चाभवत्सैन्यं सर्वमेव भयान्वितम् संचरास्त्रं च संशान्तं स्वयमायोधने बभौ //
devānāṃ cābhavatsainyaṃ sarvameva bhayānvitam saṃcarāstraṃ ca saṃśāntaṃ svayamāyodhane babhau //
And the entire army of the gods became seized with fear; and the moving missiles grew quiet—of themselves the weapons fell still upon the battlefield.
It does not describe Pralaya directly; rather, it depicts a war-omen-like moment where fear spreads through the Devas’ forces and even missiles cease, suggesting a sudden, overpowering change of cosmic momentum in battle.
By portraying panic and the collapse of martial initiative, the verse implicitly warns that leadership and discipline are crucial in crisis—fear can paralyze an army just as it can destabilize governance or household order if not mastered through steadiness and dharma.
No Vāstu or ritual procedure is stated; the key takeaway is narrative—an auspicious/inauspicious battlefield sign (weapons falling silent) often used in Purāṇas to indicate an imminent turning point or unseen higher power at work.