Matsya Purana — The Greatness of Prayaga: Manasa Tirtha
जलप्रवेशं यः कुर्यात् संगमे लोकविश्रुते राहुग्रस्ते तथा सोमे विमुक्तः सर्वकिल्बिषैः //
jalapraveśaṃ yaḥ kuryāt saṃgame lokaviśrute rāhugraste tathā some vimuktaḥ sarvakilbiṣaiḥ //
Whoever enters the water (for a ritual bath) at a world-renowned confluence, and likewise when the Moon is seized by Rāhu (during a lunar eclipse), is freed from all sins.
This verse is not about Pralaya; it teaches purification through tirtha-bathing, especially at a sacred confluence and during a lunar eclipse, emphasizing moral-spiritual cleansing rather than cosmic dissolution.
It frames a practical dharmic observance: householders (and kings as exemplars) may undertake prescribed snāna at renowned saṅgamas and during eclipses as a form of prayāścitta—maintaining personal and social purity through sanctioned ritual discipline.
The significance is ritual: jalapraveśa (sacred immersion) at a lokaviśruta saṅgama, particularly during Rāhu’s grasp of the Moon (lunar eclipse), is presented as a potent purificatory act that removes sins.