Matsya Purana — Glory of Prayaga: The Fruit of the Anashaka Fast and the Merit of the Yamuna
विश्रम्भघातकानां तु प्रयागे शृणु यत्फलम् त्रिकालमेव स्नायीत आहारं भैक्ष्यमाचरेत् त्रिभिर्मासैः स मुच्येत प्रयागे तु न संशयः //
viśrambhaghātakānāṃ tu prayāge śṛṇu yatphalam trikālameva snāyīta āhāraṃ bhaikṣyamācaret tribhirmāsaiḥ sa mucyeta prayāge tu na saṃśayaḥ //
Now hear the spiritual result at Prayāga for those who slay one who trusted them: if one bathes there at the three junctures of the day and lives on alms as one’s food, then within three months one is released from that sin at Prayāga—of this there is no doubt.
This verse does not address pralaya; it focuses on tīrtha-mahātmya and expiation—how Prayāga’s ritual discipline can remove the burden of a grave sin.
It frames a concrete prāyaścitta: disciplined bathing (trikāla-snāna) and austerity through living on alms, teaching rulers and householders that even severe wrongdoing requires humility, restraint, and sustained penance rather than mere declaration.
The ritual significance is trikāla-snāna at Prayāga combined with bhaikṣya-āhāra (subsisting on alms) for three months, presented as a formal expiatory observance tied to the sacred geography of Prayāga.