Matsya Purana — Division of Bhārata-varṣa
मालवाश्च करूषाश्च मेकलाश्चोत्कलैः सह औण्ड्रा माषा दशार्णाश्च भोजाः किष्किन्धकैः सह //
mālavāśca karūṣāśca mekalāścotkalaiḥ saha auṇḍrā māṣā daśārṇāśca bhojāḥ kiṣkindhakaiḥ saha //
Also (are found) the Mālavas and the Karūṣas; the Mekalas together with the Utkalas; the Auṇḍras, the Māṣas, the Daśārṇas, and the Bhojas, along with the people of Kiṣkindhā.
This verse does not discuss Pralaya; it is a geographical-ethnographic listing of janapadas (regions/peoples) within Bhārata-varṣa.
Indirectly, it supports rajadharma by mapping the political-cultural landscape (janapadas) a king might govern, ally with, or protect; the verse itself is descriptive rather than prescriptive.
No Vāstu or ritual procedure is stated here; the significance is locational—identifying peoples and regions that later traditions may associate with pilgrimage routes, temples, and regional cults.