Matsya Purana — The Greatness of Prayaga and Allied Tirthas
दश तीर्थसहस्राणि त्रिंशत्कोट्यस्तथा पराः प्रयागे संस्थिता नित्यम् एवमाहुर्मनीषिणः //
daśa tīrthasahasrāṇi triṃśatkoṭyastathā parāḥ prayāge saṃsthitā nityam evamāhurmanīṣiṇaḥ //
The sages declare that in Prayāga there are ever-present ten thousand tīrthas (sacred fords), and moreover thirty crores besides—abiding there perpetually.
It does not describe pralaya directly; it emphasizes the timeless, ever-abiding sanctity of Prayāga, presenting it as a perpetually present spiritual locus (nityam saṃsthitāḥ).
By praising Prayāga as a supreme tīrtha, it supports the Purāṇic householder ethic of undertaking tīrtha-yātrā, bathing, and charity in holy places as part of dharma and the pursuit of merit (puṇya).
The ritual takeaway is tīrtha-snāna and pilgrimage: the verse frames Prayāga as a concentrated field of sacred tīrthas, implying exceptional efficacy for rites like bathing, offerings, and vows performed there.