Matsya Purana — Ekoddiṣṭa Śrāddha
तस्मान्निधेयमाकाशे दशरात्रं पयस्तथा सर्वदाहोपशान्त्यर्थम् अध्वश्रमविनाशनम् //
tasmānnidheyamākāśe daśarātraṃ payastathā sarvadāhopaśāntyartham adhvaśramavināśanam //
Therefore, milk should be kept out in the open air for ten nights; it is intended to pacify all burning heat and to remove the fatigue of travel.
This verse is not about Pralaya; it belongs to practical śānti-style instructions aimed at calming bodily ‘burning’ (dāha) and restoring strength.
It presents a simple, accessible remedy a householder (and by extension a king caring for subjects and travelers) may employ for relief from heat and journey-fatigue—part of welfare-oriented dharma.
Ritually, it prescribes keeping milk under the open sky for ten nights as a cooling/pacifying measure—an example of Matsya Purana’s practical śānti procedures rather than temple architecture.