Matsya Purana — Tārakāsura’s Austerity and Boon; Mobilization for War; Bṛhaspati’s Fourfold P...
केतुर्जलाधिनाथस्य भीमधूमध्वजानलः पद्मरागमहारत्नविटपं धनदस्य तु //
keturjalādhināthasya bhīmadhūmadhvajānalaḥ padmarāgamahāratnaviṭapaṃ dhanadasya tu //
The banner-emblem (ketu) of the Lord of the ocean bears a dreadful smoky fire upon its standard; and for Dhanada (Kubera), it is a branching spray (viṭapa) of the great ruby gem (padmarāga).
This verse does not discuss Pralaya; it catalogs iconographic/ritual identifiers—especially the emblems (ketu) associated with specific deities—used for correct representation and auspicious display.
It supports dharmic duty through correct ritual order: kings and householders sponsoring temples, festivals, or public rites should use proper deity-identifying standards and auspicious materials (like prescribed gems) to avoid inauspicious mistakes in worship and state ceremonies.
It gives dhvaja/ketu specifications: Varuṇa’s emblem is described with a smoky-fire motif, while Kubera’s is a padmarāga (ruby) “branch/spray”—guiding temple banner design, festival standards, and decorative iconography in Vastu-aligned ritual spaces.