Matsya Purana — Catalogue of the Eighteen Puranas
तद्वदग्नेश्च माहात्म्यं तामसेषु शिवस्य च संकीर्णेषु सरस्वत्याः पितॄणां च निगद्यते //
tadvadagneśca māhātmyaṃ tāmaseṣu śivasya ca saṃkīrṇeṣu sarasvatyāḥ pitṝṇāṃ ca nigadyate //
Likewise, the greatness of Agni is spoken of in the Tāmasa Purāṇas; and in the mixed (Saṃkīrṇa) Purāṇas the greatness of Śiva, of Sarasvatī, and of the Pitṛs (ancestral fathers) is also described.
This verse does not directly describe pralaya; it classifies Purāṇic subject-matter, indicating where teachings such as divine “māhātmya” (sacred greatness) are typically emphasized.
By highlighting the Pitṛs and their praise in Saṃkīrṇa texts, it implicitly supports the householder’s duty of śrāddha and ancestral offerings—core obligations also upheld by righteous kings as patrons of dharma.
The ritual takeaway is the prominence of Agni (central to yajña) and the Pitṛs (central to śrāddha). While not architectural, it points to the ritual framework that underlies temple and household fire-rites.