Matsya Purana — The Slaying of Jambha and the Rise of Tāraka: Divine Battle Formations
ततो नारायणास्त्रं तत् पपातासुरवक्षसि महास्त्रभिन्नहृदयः सुस्राव रुधिरं च सः //
tato nārāyaṇāstraṃ tat papātāsuravakṣasi mahāstrabhinnahṛdayaḥ susrāva rudhiraṃ ca saḥ //
Then that Nārāyaṇa-missile fell upon the demon’s chest; his heart, split by the mighty weapon, he poured forth blood.
This verse does not address pralaya directly; it highlights divine intervention through the Nārāyaṇāstra, a motif often used in Purāṇas to show cosmic order (dharma) reasserting itself when threatened by asuric forces.
Indirectly, it reinforces the Matsya Purana’s ethical frame: rulers must protect society by restraining violent, destructive forces (symbolized by the asura), using proportionate power and righteous intent—mirroring the ideal of danda (just punishment) guided by dharma.
No Vāstu or temple-ritual rule is stated in this verse; its ritual takeaway is symbolic—invoking Nārāyaṇa and his astras in stotra/recitation traditions as emblems of protection and the removal of obstructive, hostile forces.