Matsya Purana — The Attendant Hosts of the Sun and Moon: Monthly Gaṇas
विश्वावसुसुषेणौ च प्रातश्चैव रथश्च हि प्रम्लोचेत्यप्सराश्चैव निम्रोचन्ती च ते उभे //
viśvāvasusuṣeṇau ca prātaścaiva rathaśca hi pramlocetyapsarāścaiva nimrocantī ca te ubhe //
And (the Gandharvas) Viśvāvasu and Suṣeṇa; and also Prāta and Ratha indeed. And the Apsarases are named Pramlocā, and also Nimrocantī—these two being the pair mentioned.
This verse does not discuss Pralaya; it functions as a catalog of celestial beings (Gandharvas and Apsarases) preserved in Purāṇic tradition.
Indirectly, such enumerations support Purāṇic education (itihāsa-purāṇa learning) expected in royal courts and learned households, but the verse itself gives names rather than ethical injunctions.
No Vāstu or ritual procedure is stated here; the verse is primarily on mythic-cosmological personnel (Gandharvas/Apsarases) rather than temple-building or rites.