Matsya Purana — The Kauśika Descendants: Śrāddha
पितॄणां चैव माहात्म्याज् जाता जातिस्मरास्तु ते ते तु वैराग्ययोगेन आस्थायानशनं पुनः //
pitṝṇāṃ caiva māhātmyāj jātā jātismarāstu te te tu vairāgyayogena āsthāyānaśanaṃ punaḥ //
And by the very greatness of the Pitṛs, they were born as jātismaras, remembering their former lives. Then, established in the discipline of dispassion (vairāgya), they again undertook fasting, abstaining from food.
This verse does not directly discuss Pralaya; it emphasizes karmic-spiritual consequences linked to the glory of the Pitṛs—specifically, birth with past-life memory and the turn toward renunciation.
It supports the Matsya Purana’s ethic that honoring the Pitṛs (through śrāddha and ancestral rites) has profound spiritual outcomes; for householders and rulers, Pitṛ-dharma is a stabilizing duty that can lead to higher spiritual dispositions such as vairāgya.
The ritual takeaway is the Pitṛ-centered framework behind śrāddha and austerity: the verse highlights anaśana (fasting) as a renunciatory observance arising from Pitṛ-mahātmyā, rather than any Vāstu or temple-building rule.