Matsya Purana — The Attendant Hosts of the Sun and Moon: Monthly Gaṇas
सूर्येण गोभिर्हि विवर्धिताभिर् अद्भिः पुनश्चैव समुच्छ्रिताभिः वृष्ट्याभिवृष्टाभिर् अथौषधीभिर् मर्त्या अथान्नेन क्षुधं जयन्ति //
sūryeṇa gobhirhi vivardhitābhir adbhiḥ punaścaiva samucchritābhiḥ vṛṣṭyābhivṛṣṭābhir athauṣadhībhir martyā athānnena kṣudhaṃ jayanti //
By the Sun, the waters are indeed increased; and those waters, rising up again, become rain. From that rainfall herbs and plants flourish; and then, by food (grain), human beings overcome hunger.
Rather than describing Pralaya directly, the verse explains the sustaining order of creation: sun → waters → rain → herbs/crops → food, showing how the cosmos supports life through a regulated natural cycle.
It implies that protecting agriculture, water resources, and timely rainfall (through governance and ritual responsibility) is central to rājadharma and gṛhastha-dharma, because people ‘conquer hunger’ only when food production is supported.
No direct Vāstu rule is stated, but the verse supports ritual priorities (yajña, rain-invoking rites, and annadāna/food charity) and, by extension, settlement planning that safeguards water bodies and agricultural fertility—key concerns in Matsya Purana Vastu-oriented chapters.