Matsya Purana — Solar–Lunar Motions
ज्येष्ठा विशाखा मैत्रं च मृगवीथी तथोच्यते मूलं पूर्वोत्तराषाढे वीथी वैश्वानरी भवेत् //
jyeṣṭhā viśākhā maitraṃ ca mṛgavīthī tathocyate mūlaṃ pūrvottarāṣāḍhe vīthī vaiśvānarī bhavet //
Jyeṣṭhā, Viśākhā, and Maitra (Anurādhā) are said to belong to the Mṛga‑vīthī. Mūla together with Pūrvāṣāḍhā and Uttarāṣāḍhā forms the Vaiśvānara‑vīthī.
This verse does not address pralaya; it is a technical jyotiṣa passage grouping specific nakshatras into named vīthis (stellar pathways) for traditional astral classification.
By defining nakshatra groupings, it supports choosing proper muhūrtas for royal and household actions—such as consecrations, journeys, alliances, or major rites—where timing based on nakshatra categories is treated as part of prudent dharmic governance and domestic discipline.
Indirectly, such nakshatra-vīthī classifications are used to select auspicious times for temple rites, installations, and Vastu-linked ceremonies (foundation laying, prāṇa-pratiṣṭhā), aligning ritual scheduling with prescribed astral groupings.