Matsya Purana — Glory of Tīrtha-Śrāddha: Best Times
यत्र शार्ङ्गधरो विष्णुर् मेखलायामवस्थितः तथा मन्दोदरीतीर्थं तीर्थं चम्पा नदी शुभा //
yatra śārṅgadharo viṣṇur mekhalāyāmavasthitaḥ tathā mandodarītīrthaṃ tīrthaṃ campā nadī śubhā //
There, Viṣṇu—the bearer of the Śārṅga bow—abides at Mekhalā. There too are the sacred ford called Mandodarī-tīrtha and the auspicious Campā River, a revered place of pilgrimage.
This verse does not describe Pralaya; it functions as tirtha-mahātmya, identifying holy locations where Vishnu is worshipped and where sacred rivers/ford-sites confer religious merit.
It supports the dharma of pilgrimage and sacred observance: a householder (and a king as patron of dharma) is encouraged to honor Vishnu, visit tīrthas, and protect/maintain holy sites and riverbanks as part of righteous governance and personal religious discipline.
Ritually, it marks a Vishnu-sthāna and named tīrtha suitable for bathing, offerings, and worship; architecturally, it implies a recognized Vishnu sacred seat (kṣetra) where temple worship and tirtha-associated rites are traditionally established.