Matsya Purana — The Cave-Sanctuary: Jewel-Lake
न क्षिणोति यथा कण्ठं कुक्षिं नापूरयत्यपि तृप्तिं विधत्ते परमां शरीरे च महत्सुखम् //
na kṣiṇoti yathā kaṇṭhaṃ kukṣiṃ nāpūrayatyapi tṛptiṃ vidhatte paramāṃ śarīre ca mahatsukham //
It does not wear out the throat as it goes down; it does not even overfill the belly—yet it brings supreme satisfaction, and in the body it produces great comfort.
This verse is ethical and experiential rather than cosmological; it highlights a form of satisfaction that benefits the body without harm, not the mechanics of Pralaya.
It supports the Matsya Purana’s dharmic ideal of moderation and non-injury: a ruler or householder should encourage sustenance and charity that gives contentment without excess or harm to the body.
No direct Vastu or temple-ritual rule is stated; the takeaway is ritual-ethical—choose offerings/consumption that are moderate, non-harming, and conducive to lasting contentment.