Matsya Purana — The Observance of Ananta-Tritiya
एवं सम्पूज्य विधिवद् अग्रतः पद्ममालिखेत् पत्त्रैर्द्वादशभिर्युक्तं कुङ्कुमेन सकर्णिकम् //
evaṃ sampūjya vidhivad agrataḥ padmamālikhet pattrairdvādaśabhiryuktaṃ kuṅkumena sakarṇikam //
Thus, after duly offering worship according to the prescribed rite, one should draw a lotus in front, furnished with twelve petals, and with its pericarp (karṇikā) indicated, using kuṅkuma (saffron).
This verse is not about Pralaya; it gives a practical ritual instruction—after worship, a lotus-diagram is to be drawn as part of a ceremonial setup.
It reflects the householder/royal duty of performing rites correctly (vidhivat). A king or patron commissioning rituals or temples must ensure proper procedural details, including prescribed sacred diagrams.
It prescribes a padma (lotus) mandala with twelve petals and a marked center (karṇikā), drawn with kuṅkuma—typical of Vastu/temple-ritual layout symbolism and consecratory procedures.