Matsya Purana — The Rite of the Vibhūti-Dvādaśī Vow
कन्दर्पाय नमो मेढ्रम् आदित्याय नमः करौ दामोदरायेत्युदरं वासुदेवाय च स्तनौ //
kandarpāya namo meḍhram ādityāya namaḥ karau dāmodarāyetyudaraṃ vāsudevāya ca stanau //
He should perform nyāsa by assigning the homage-mantra: “Namo Kandarpāya” upon the generative organ; “Namo Ādityāya” upon the hands; “(Namo) Dāmodarāya” upon the abdomen; and “Namo Vāsudevāya” upon the chest.
This verse does not discuss pralaya; it teaches a ritual technique (nyāsa) where divine names are installed on specific body parts to sacralize the practitioner before worship.
It frames daily or occasional worship as a disciplined practice: a householder (and by extension a king) is to perform rites correctly, using mantra-nyāsa to cultivate purity, self-control, and devotion before undertaking religious acts.
Ritually, it is a clear nyāsa prescription (mantra-to-limb assignment) used in Vaiṣṇava pūjā and consecratory contexts; such preparatory rites commonly precede temple worship, icon service (arcana), and formal mantra recitation.