Matsya Purana — Paurava Genealogy
शरद्वतस्तु दायादम् अहल्या सम्प्रसूयत शतानन्दमृषिश्रेष्ठं तस्यापि सुमहातपाः //
śaradvatastu dāyādam ahalyā samprasūyata śatānandamṛṣiśreṣṭhaṃ tasyāpi sumahātapāḥ //
Ahalyā bore to Śaradvat a rightful heir—Śatānanda, the foremost among sages; and he too was a great ascetic, endowed with intense austerity.
This verse does not discuss pralaya; it records a lineage detail—Ahalyā bearing Śatānanda to Śaradvat—highlighting continuity of rishi lines rather than cosmic dissolution.
Indirectly, it upholds the Purāṇic ideal of legitimate succession (dāyāda) and the social esteem of tapas: rulers and householders are encouraged to honor learned ascetics and maintain lawful lineage and dharmic continuity.
No explicit vāstu or temple-ritual rule appears here; the ritual takeaway is the Purāṇic emphasis on venerating great ascetics (mahā-tapasvin) within dharmic society.