Matsya Purana — Agastya’s Origin
एवं वर्षसहस्राणि वीराः पञ्च च सप्त च जलदुर्गबलाद्ब्रह्मन् पीडयन्ति जगत्त्रयम् //
evaṃ varṣasahasrāṇi vīrāḥ pañca ca sapta ca jaladurgabalādbrahman pīḍayanti jagattrayam //
Thus, for thousands of years, those twelve mighty warriors—O Brahman—by the strength of their water-fortress kept afflicting the three worlds.
This verse does not describe Pralaya directly; it highlights prolonged cosmic oppression of the three worlds, a common narrative trigger that precedes divine intervention in Purāṇic cycles.
By portraying sustained suffering caused by fortified aggressors, it implicitly supports the dharmic duty of rulers to protect subjects and restore order when power is misused.
The term jala-durga (“water-fort”) points to a strategic fortification type; while not a Vāstu rule itself, it aligns with Purāṇic awareness of defensive urban/fort planning—useful for readers searching “Matsya Purana Vastu Shastra tips” about fort categories.