Matsya Purana — Division of Bhārata-varṣa
प्राग्ज्योतिषाश्च पुण्ड्राश्च विदेहास्ताम्रलिप्तकाः शाल्वमागधगोनर्दाः प्राच्या जनपदाः स्मृताः //
prāgjyotiṣāśca puṇḍrāśca videhāstāmraliptakāḥ śālvamāgadhagonardāḥ prācyā janapadāḥ smṛtāḥ //
Prāgjyotiṣa, Puṇḍra, Videha, and the people of Tāmraliptaka—together with the Śālvas, the Māgadhas, and the Gonardas—are remembered as the eastern (Prācya) provinces.
This verse does not discuss Pralaya; it belongs to the Matsya Purana’s geographical catalogue, classifying specific peoples as eastern (Prācya) janapadas.
Indirectly, such janapada lists support rajadharma by mapping realms and peoples a king may govern, protect, tax, or ally with; the verse itself is descriptive rather than prescriptive.
No direct Vāstu or ritual rule is stated; the significance is contextual—identifying regions (like Tāmralipti) that later tradition associates with trade routes and temple patronage, useful for historical and cultural indexing.