Matsya Purana — Conclusion of the Prayaga Mahatmya: Kingship Restored
ततस्तत्र समाप्लाव्य गात्राणि सगणो नृपः यथोक्तेनाथ विधिना परां निर्वृतिमागमत् //
tatastatra samāplāvya gātrāṇi sagaṇo nṛpaḥ yathoktenātha vidhinā parāṃ nirvṛtimāgamat //
Then, there itself, the king—together with his attendants—bathed and cleansed his limbs; and, following the procedure exactly as prescribed, he attained profound tranquility and contentment.
This verse does not describe pralaya directly; it emphasizes ritual purification and correct observance (vidhi) as a means to attain inner calm—an ethical-ritual theme rather than a cosmological one.
It portrays the king as a model practitioner of dharma: he performs bodily purification and follows prescribed rules precisely, suggesting that rulers (and householders) should uphold disciplined, text-guided conduct to cultivate serenity and auspiciousness.
The ritual significance is the stress on yathokta-vidhi—doing rites exactly as enjoined—especially bathing/purification as a preparatory act that supports successful worship, vows, donations, or other sanctioned ceremonies.