Matsya Purana — The Array of the Gods: Description of the Vaiṣṇava Host and the Lokapālas
नीललोहितपीताभिः पताकाभिरलंकृतम् केतुवेषप्रतिच्छन्नं महाकायनिकेतनम् //
nīlalohitapītābhiḥ patākābhiralaṃkṛtam ketuveṣapraticchannaṃ mahākāyaniketanam //
Adorned with blue, red, and yellow banners, and covered with the fittings and dress of lofty pennants, it becomes a grand abode of vast proportions.
This verse does not discuss Pralaya; it focuses on auspicious architectural ornamentation—banners and pennants—used to mark and beautify a large sacred structure.
It supports the duty of patrons (kings/householders) to sponsor and maintain properly adorned sacred buildings, where correct external emblems (flags/pennants) publicly signify sanctity, prosperity, and orderly worship.
It prescribes visible temple identifiers—colored flags (patākā) and pennants/standards (ketu)—as integral exterior features that complete the temple’s auspicious appearance and ceremonial readiness.