Matsya Purana — The Birth of Tāraka: Varāṅgī’s Lament
एवमुक्तस्तु संक्षुब्धस् तस्याः पुत्रार्थमुद्यतः तपो घोरं करिष्यामि जयाय त्रिदिवौकसाम् //
evamuktastu saṃkṣubdhas tasyāḥ putrārthamudyataḥ tapo ghoraṃ kariṣyāmi jayāya tridivaukasām //
Thus addressed, he was deeply agitated; and, striving to obtain a son for her sake, he resolved: “I shall undertake terrible austerities, to win victory even over the dwellers of the three heavens.”
This verse does not address Pralaya; it emphasizes personal resolve and ascetic power (tapas) used to fulfill a lineage goal—obtaining a son.
It reflects the Purāṇic ideal that a ruler/householder safeguards lineage and social continuity; when ordinary means fail, disciplined tapas is taken up as a dharmic effort toward putra-prāpti (securing progeny).
No Vāstu or temple-building rule is stated here; the ritual takeaway is the centrality of tapas (austerity) as a sanctioned spiritual method to obtain boons and accomplish dharmic aims.