Matsya Purana — Glory of Prayaga: The Fruit of the Anashaka Fast and the Merit of the Yamuna
त्वद्दर्शनात्तु धर्मात्मन् मुक्तो ऽहं चाद्य किल्बिषात् इदानीं वेद्मि चात्मानं भगवन्गतकल्मषम् //
tvaddarśanāttu dharmātman mukto 'haṃ cādya kilbiṣāt idānīṃ vedmi cātmānaṃ bhagavangatakalmaṣam //
O righteous-souled one, by the very sight of you I have today been freed from sin. Now, O Lord, I know myself to be cleansed—my impurities have departed.
It emphasizes spiritual deliverance amid the Pralaya narrative: salvation is shown as immediate purification through divine presence (darśana), even when cosmic dissolution themes frame the dialogue.
It models the ideal ethical stance: a ruler/householder should seek dharma through humility and self-purification, recognizing that inner cleanliness (freedom from kalmaṣa) is foundational for righteous governance and conduct.
No direct Vāstu or temple-building rule appears here; the ritual takeaway is the Purāṇic principle that darśana of the Lord/saintly righteous grants purification, supporting practices like tīrtha-darśana and deity-darśana as expiatory observances.