Matsya Purana — The Kalyāṇa-Saptamī
पूर्वेण तपनायेति मार्तण्डायेति चानले याम्ये दिवाकरायेति विधात्र इति नैरृते //
pūrveṇa tapanāyeti mārtaṇḍāyeti cānale yāmye divākarāyeti vidhātra iti nairṛte //
In the eastern direction he is called Tapana; in the south-east, the fire-quarter, he is called Mārtaṇḍa; in the south he is called Divākara; and in the south-west, the Nairṛta quarter, he is called Vidhātṛ.
This verse does not discuss Pralaya; it gives technical, direction-based epithets of the Sun used for orientation and ritual correctness.
It supports dharmic practice by prescribing correct directional identifications for worship and rites—useful for household rituals and for kings commissioning temples, altars, or public sacred layouts.
It encodes Vastu/ritual orientation: the Sun is invoked by different names in specific quarters (east, south-east, south, south-west), aiding correct placement, circumambulation logic, and quarter-specific invocations in temple and fire-ritual procedures.