Matsya Purana — Śrāddha Procedure: Types
गोमयेनोपलिप्ते तु दक्षिणप्रवणे स्थले श्राद्धं समाचरेद्भक्त्या गोष्ठे वा जलसंनिधौ //
gomayenopalipte tu dakṣiṇapravaṇe sthale śrāddhaṃ samācaredbhaktyā goṣṭhe vā jalasaṃnidhau //
One should perform the Śrāddha with devotion in a place plastered with cow-dung, on ground sloping to the south—either in a cowshed or near a body of water.
This verse is not about Pralaya; it focuses on Dharma—specifically, correct conditions and locations for performing Śrāddha rites for the ancestors.
It gives practical householder (and ruler-as-upholder-of-dharma) guidance: Śrāddha should be done with devotion and with attention to ritual cleanliness and auspicious setting, reflecting the obligation to honor the Pitṛs.
Ritually, it prescribes an auspicious, purified site: a cow-dung-smeared ground (traditional purifier), preferably south-sloping (direction associated with the Pitṛs), and either a cowshed or near water—both considered conducive to sanctity and proper rite-performance.