Matsya Purana — The Observance of Viśoka-Dvādaśī: A Lakṣmī–Viṣṇu Vow for Sorrow-Removal and P...
रजनीषु च सर्वासु पिबेद्दर्भोदकं बुधः ततस्तु गीतनृत्यादि कारयेत्सकलां निशाम् //
rajanīṣu ca sarvāsu pibeddarbhodakaṃ budhaḥ tatastu gītanṛtyādi kārayetsakalāṃ niśām //
On every night, the wise person should drink water sanctified with darbha grass; thereafter, he should have singing, dancing, and the like performed throughout the entire night.
This verse is not about pralaya; it prescribes a ritual discipline—purificatory darbha-water and an all-night devotional vigil with music and dance.
It supports the householder’s (and by extension a king’s) dharmic duty to uphold religious observances: maintaining purity (darbha-water) and sponsoring community devotional activities (gīta-nṛtya) during prescribed nights.
Ritually, darbha (kuśa) is a standard purifier in Vedic-Puranic practice; the verse also indicates nishā-jāgaraṇa—staying awake with devotional performance—as a key component of the observance.