Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
कम्पितं मानसं चैव हंसकारण्डवाकुलम् त्रिशृङ्गपर्वतश्चैव कुमारी च सरिद्वरा //
kampitaṃ mānasaṃ caiva haṃsakāraṇḍavākulam triśṛṅgaparvataścaiva kumārī ca saridvarā //
He also described the trembling (wind-stirred) Mānasa Lake, filled with swans and kāraṇḍava ducks; likewise Triśṛṅga Mountain, and the excellent river named Kumārī.
This verse does not describe Pralaya; it functions as sacred geography (tīrtha) narration, listing holy natural sites—Mānasa Lake, Triśṛṅga Mountain, and the Kumārī River.
Indirectly, it supports the Purāṇic duty of seeking merit through tīrtha-yātrā: a householder or ruler sustains dharma by honoring sacred places, patronizing pilgrimage routes, and protecting rivers, lakes, and their environs.
The verse is primarily topographical, but its ritual takeaway is tīrtha practice—bathing, worship, and offerings at revered lakes/rivers; such sites often become loci for ghāṭas, shrines, and temple foundations in later sacred landscape planning.