Matsya Purana — Yadu Lineage
तृतीयस्तु वराहश्च चतुर्थो ऽमृतमन्थनः संग्रामः पञ्चमश्चैव संजातस्तारकामयः //
tṛtīyastu varāhaśca caturtho 'mṛtamanthanaḥ saṃgrāmaḥ pañcamaścaiva saṃjātastārakāmayaḥ //
The third is Varāha (the Boar incarnation); the fourth is the churning for the nectar, amṛta-manthana. The fifth, too, is the battle that arose—the Tārakāmaya war.
It does not directly describe pralaya; it functions as an index of major mythic events—Varāha’s cosmic rescue, the amṛta-manthana, and the Tārakāmaya war—within the Purāṇic world-order.
Indirectly: these episodes are exemplars of dharma in narrative form—cosmic protection (Varāha), cooperative and conflict-driven pursuit of power (amṛta-manthana), and the consequences of rivalry (Tārakāmaya)—themes often used by the Matsya Purāṇa to frame ethical reflection for rulers and householders.
No explicit Vāstu or ritual procedure is stated here; the verse is a catalog of narratives rather than a technical prescription for temple-building or rites.