Matsya Purana — Vishnu’s Battle with the Daityas: Astra-Combat
अपरे दानवेन्द्रास्तु यत्ता नानास्त्रपाणयः आजघ्नुः समरे क्रुद्धा विष्णुमक्लिष्टकारिणम् //
apare dānavendrāstu yattā nānāstrapāṇayaḥ ājaghnuḥ samare kruddhā viṣṇumakliṣṭakāriṇam //
Other lordly Dānava chiefs, fully prepared and bearing many kinds of weapons, angrily struck at Viṣṇu in the battle—Viṣṇu, the tireless doer of deeds, unwearied in action.
This verse does not address Pralaya directly; it emphasizes Vishnu’s role as an indefatigable divine power in conflict, a theme that underlies his cosmic protection across cycles.
Indirectly, it highlights preparedness (yattāḥ) and steadfast action under pressure—qualities praised in royal duty (rājadharma) and disciplined household life, even though the scene is mythic warfare.
No Vāstu or ritual procedure is specified in this verse; its focus is martial—weapon-bearing foes attacking Vishnu—rather than temple-building or rites.