Matsya Purana — Kṛṣṇāṣṭamī Vrata: Monthly Śiva-Names
*श्रीभगवानुवाच कृष्णाष्टमीमथो वक्ष्ये सर्वपापप्रणाशिनीम् शान्तिर्मुक्तिश्च भवति जयः पुंसां विशेषतः //
*śrībhagavānuvāca kṛṣṇāṣṭamīmatho vakṣye sarvapāpapraṇāśinīm śāntirmuktiśca bhavati jayaḥ puṃsāṃ viśeṣataḥ //
The Blessed Lord said: “Now I shall describe Kṛṣṇāṣṭamī, the observance that destroys all sins. From it arise peace and liberation (mokṣa)—and, especially for men, victory as well.”
This verse does not discuss pralaya directly; it frames a dharma-teaching on Kṛṣṇāṣṭamī as a sin-destroying observance that yields peace and liberation—goals often sought for spiritual security across cosmic cycles.
It introduces a vrata that supports ethical purification (sarva-pāpa-praṇāśinī) and social-royal stability (śānti, jaya). For householders and rulers alike, such observances are presented as practical dharma-tools to cultivate restraint, merit, and auspicious outcomes.
Architectural rules are not mentioned; the ritual significance is the announcement of Kṛṣṇāṣṭamī as a powerful vrata/tithi-observance associated with purification, peace, and mokṣa-oriented merit.