Matsya Purana — The Kalyāṇa-Saptamī
पश्चिमे वरुणायेति भास्करायेति चानिले सौम्ये विकर्तनायेति रवये चाष्टमे दले //
paścime varuṇāyeti bhāskarāyeti cānile saumye vikartanāyeti ravaye cāṣṭame dale //
In the western direction one should invoke (the deity) with the mantra “to Varuṇa”; in the quarter of Vāyu (the wind-direction) with “to Bhāskara”; in the northern (saumya) quarter with “to Vikartana”; and on the eighth petal (of the lotus-diagram) with “to Ravi.”
This verse does not address Pralaya; it belongs to a technical ritual/architectural instruction set describing directional invocation (dik-nyasa) using specific deity-names and lotus-petal positions.
For a king or householder commissioning a shrine, altar, or consecration rite, the verse functions as a compliance rule: correct directional placement and invocation of deities is part of maintaining ritual order (dharma) and auspiciousness in public and domestic worship.
It specifies a directional mapping for mantra-invocation—Varuṇa in the west, Vāyu’s quarter associated with Bhāskara, the northern (saumya) quarter with Vikartana, and the eighth lotus petal with Ravi—indicating a lotus-mandala based placement used in Vastu/temple rites.