Matsya Purana — Glory of Prayaga: The Fruit of the Anashaka Fast and the Merit of the Yamuna
अज्ञानेन तु यस्येह तीर्थयात्रादिकं भवेत् सर्वकामसमृद्धस्तु स्वर्गलोके महीयते स्थानं च लभते नित्यं धनधान्यसमाकुलम् //
ajñānena tu yasyeha tīrthayātrādikaṃ bhavet sarvakāmasamṛddhastu svargaloke mahīyate sthānaṃ ca labhate nityaṃ dhanadhānyasamākulam //
But even if, in this world, one undertakes pilgrimage to sacred fords (tīrthas) and similar pious acts unknowingly, one becomes endowed with the fulfillment of all desires; one is honored in the heavenly realm and attains an abiding station ever filled with wealth and grain.
This verse does not address pralaya; it focuses on the efficacy of pilgrimage and pious acts, stating they yield heavenly honor and lasting prosperity even when done without full understanding.
It supports the householder/kingly ideal of sustaining dharma through tīrtha-yātrā and religious observances: even imperfect or uninformed performance generates puṇya, social stability, and prosperity (dhanadhānya), reinforcing dharmic life.
Ritually, it highlights tīrtha-yātrā and allied observances as inherently meritorious; no specific Vāstu or temple-construction rule is stated, but it underlines the Purāṇic principle that sacred acts themselves carry transformative potency.