Matsya Purana — Glory of Prayaga: The Fruit of the Anashaka Fast and the Merit of the Yamuna
अनाशकफलं ब्रूहि भगवंस्तत्र कीदृशम् यं च लोकमवाप्नोति विशुद्धः सर्वकिल्बिषैः //
anāśakaphalaṃ brūhi bhagavaṃstatra kīdṛśam yaṃ ca lokamavāpnoti viśuddhaḥ sarvakilbiṣaiḥ //
Tell me, O Blessed Lord, what is the fruit of the anāśaka observance (abstaining from food) there, and of what kind is it? And to which world does one attain, purified of all sins?
This verse does not describe pralaya directly; it focuses on dharma through fasting (anāśaka) and asks about the karmic result—purification from sin and attainment of a higher realm.
It frames fasting as a dharmic discipline relevant to householders and rulers alike: by observing a rigorous vrata, one seeks moral purification (sarva-kilbiṣa-śuddhi) and auspicious posthumous destiny—key concerns in Purāṇic royal/householder ethics.
No architectural (vāstu) detail appears in this verse; its ritual significance is the emphasis on vrata-vidhi and phala—fasting as a purificatory observance whose merit and resulting ‘loka’ are being requested.