Matsya Purana — Kailasa
सप्त चैताः प्लावयन्ति वर्षं तु हिमसाह्वयम् प्रसूताः सप्त नद्यस्तु शुभा बिन्दुसरोद्भवाः //
sapta caitāḥ plāvayanti varṣaṃ tu himasāhvayam prasūtāḥ sapta nadyastu śubhā bindusarodbhavāḥ //
These seven streams flood and water the mountain-region called Himavat. They are seven auspicious rivers, born forth from Bindusaras, the lake named Bindusaras.
It does not describe Pralaya directly; instead it maps sacred geography by stating that seven auspicious rivers originate from Bindusaras and water the Himavat region.
Indirectly, it supports dharmic life by identifying sacred rivers and regions associated with pilgrimage, purification, and merit—practices encouraged for householders and protected/promoted by righteous kings.
Ritually, rivers and their sources function as tīrthas for स्नान (sacred bathing), offerings, and vows; such verses guide where rites may be performed and where temples/ghāṭas are traditionally established.