Matsya Purana — Glory of Prayaga: The Fruit of the Anashaka Fast and the Merit of the Yamuna
*मार्कण्डेय उवाच शृणु राजन्महागुह्यं सर्वपापप्रणाशनम् मासमेकं तु यः स्नायात् प्रयागे नियतेन्द्रियः मुच्यते सर्वपापेभ्यः स गच्छेत्परमं पदम् //
*mārkaṇḍeya uvāca śṛṇu rājanmahāguhyaṃ sarvapāpapraṇāśanam māsamekaṃ tu yaḥ snāyāt prayāge niyatendriyaḥ mucyate sarvapāpebhyaḥ sa gacchetparamaṃ padam //
Mārkaṇḍeya said: Listen, O King, to this great secret that destroys all sins. Whoever, with senses restrained, bathes at Prayāga for a full month is freed from all sins and attains the supreme state.
This verse does not address pralaya or cosmology; it focuses on tirtha-dharma—how disciplined bathing at Prayāga is said to destroy sins and lead to the highest spiritual goal.
Addressed to a king, it frames royal/householder ethics around self-control (niyatendriya) and dharmic observance: undertaking regulated vows and pilgrimage practices as a means of purification and spiritual uplift.
The ritual significance is a month-long bathing observance (snāna) at the tirtha of Prayāga with controlled senses; no Vāstu or temple-construction rule is stated in this verse.