Matsya Purana — Genealogy from Budha to Purūravas and Yayāti; Raji’s war episode; the Paurava...
अतिभक्त्या पितॄनर्च्य देवांश्च प्रयतः सदा अथाजयत्प्रजाः सर्वा ययातिरपराजितः //
atibhaktyā pitṝnarcya devāṃśca prayataḥ sadā athājayatprajāḥ sarvā yayātiraparājitaḥ //
With intense devotion, he continually worshipped the Pitṛs (ancestral spirits) and the gods, ever disciplined and pure; thereafter Yayāti, unconquered, brought all peoples under his sway.
This verse does not address Pralaya; it emphasizes how devotion and ritual purity empower a king’s worldly success and stability.
It frames ideal rulership as grounded in nitya-arcana—regular worship of ancestors and gods—together with self-discipline (prayata), implying that political authority should rest on dharmic conduct and reverence for lineage.
The ritual significance is Pitṛ-yajña and deva-arcana performed in purity and restraint; no specific Vāstu or temple-building rule is stated in this verse.