Matsya Purana — Genealogy and Classification of Sacred Fires
तासु षोडशधात्मानं प्रविभज्य पृथक्पृथक् तदा तु विहरंस्तासु धिष्ण्येच्छः स बभूव ह //
tāsu ṣoḍaśadhātmānaṃ pravibhajya pṛthakpṛthak tadā tu viharaṃstāsu dhiṣṇyecchaḥ sa babhūva ha //
Having divided his own presence into sixteen parts, each distinct, he then moved about within them; and at that time he became intent upon the various residential seats—dhiṣṇyas.
This verse is not about Pralaya; it describes ordered spatial division—an architectural/cosmological principle of distributing presence into sixteen parts and dwelling within designated seats (dhiṣṇyas).
It supports the duty of orderly establishment of residences and precincts: a king plans settlements and administrative quarters, while a householder maintains properly designated spaces for living and ritual—each ‘seat’ serving a defined function.
The key idea is ṣoḍaśadhā-vibhāga (sixteenfold division) connected with dhiṣṇyas—designated stations/quarters—pointing to systematic zoning and allocation of dwelling/ritual spaces in Vastu-based planning.