Matsya Purana — The Sarasvata Vrata: Vow for Sweet Speech
एवं सम्पूज्य गायत्रीं वीणाक्षमणिधारिणीम् शुक्लपुष्पाक्षतैर् भक्त्या सकमण्डलुपुस्तकाम् मौनव्रतेन भुञ्जीत सायं प्रातस्तु धर्मवित् //
evaṃ sampūjya gāyatrīṃ vīṇākṣamaṇidhāriṇīm śuklapuṣpākṣatair bhaktyā sakamaṇḍalupustakām maunavratena bhuñjīta sāyaṃ prātastu dharmavit //
Having thus duly worshipped Goddess Gāyatrī—who bears the vīṇā, the rosary, and the jewel—adorning her with white flowers and unbroken rice-grains in devotion, and contemplating her as holding the water-pot (kamaṇḍalu) and the sacred book, the knower of dharma should take his meal in silence (mauna-vrata), both in the evening and in the morning.
This verse does not address pralaya; it focuses on daily ritual discipline—specifically the worship of Gāyatrī and the observance of silence while eating.
It prescribes a dharmic routine: worshipping Gāyatrī with purity symbols (white flowers, akṣata) and maintaining self-control (mauna) during meals at the key daily junctions of morning and evening—conduct applicable to both rulers and householders as part of disciplined living.
Ritually, it gives a specific Gāyatrī-pūjā method and iconographic cues (vīṇā, rosary, jewel, kamaṇḍalu, book), plus the practice of mauna-vrata while eating—useful for designing worship protocols and deity descriptions in temple or home-altar contexts.