Matsya Purana — Duties of the Four Āśramas and the Power of Mauna
अथ लोकमिमं जित्वा लोकं चापि जयेत्परम् आस्येन तु यदाहारं गोवन्मृगयते मुनिः अथास्य लोकैः सर्वो यः सो ऽमृतत्वाय कल्पते //
atha lokamimaṃ jitvā lokaṃ cāpi jayetparam āsyena tu yadāhāraṃ govanmṛgayate muniḥ athāsya lokaiḥ sarvo yaḥ so 'mṛtatvāya kalpate //
Then, having conquered this world, he also conquers the higher world. The sage who seeks his food only by his mouth—wandering and foraging like a cow—becomes fit for immortality; indeed, all the worlds become his.
It does not describe pralaya directly; it teaches a moksha-oriented principle: mastery over desire and disciplined living is portrayed as a conquest of “worlds,” culminating in fitness for immortality.
Indirectly, it sets an ideal of restraint: even for householders and rulers, reducing greed and practicing moderated consumption supports dharma; for renunciants, the verse points to radical simplicity (living by humble foraging) as a path toward liberation.
No Vastu Shastra or temple-ritual rule is stated here; the focus is ascetic discipline and the spiritual “fruit” (immortality) attributed to extreme simplicity in sustenance.