Matsya Purana — The Greatness and Procedure of the Aṅgāra
प्रह्लादस्य सुतं दृष्ट्वा द्विरष्टपरिवत्सरम् रूपेणाप्रतिमं कान्त्या सो ऽहसद्भृगुनन्दनः //
prahlādasya sutaṃ dṛṣṭvā dviraṣṭaparivatsaram rūpeṇāpratimaṃ kāntyā so 'hasadbhṛgunandanaḥ //
Seeing Prahlāda’s son—sixteen years of age—unsurpassed in form and radiant with beauty, that descendant of Bhṛgu smiled.
This verse does not discuss Pralaya; it is a narrative-genealogical description highlighting a descendant’s age, beauty, and the reaction of a Bhṛgu-line figure.
Indirectly, it reflects a Purāṇic emphasis on lineage and exemplary qualities (youth, radiance, excellence) that often frame discussions of conduct and social ideals, though no explicit rājadharma or gṛhadharma rule is stated here.
No Vāstu, temple-building, iconography, or ritual procedure is mentioned; the verse is purely descriptive within a dynastic episode.