Matsya Purana — Solar Dynasty Prelude: Vivasvān–Saṃjñā–Chāyā
छायायां जनयामास संज्ञेयमिति भास्करः छाया स्वपुत्रे ऽभ्यधिकं स्नेहं चक्रे मनौ तथा //
chāyāyāṃ janayāmāsa saṃjñeyamiti bhāskaraḥ chāyā svaputre 'bhyadhikaṃ snehaṃ cakre manau tathā //
In Chāyā, Bhāskara (the Sun) begot a son named Saṃjñeya. And Chāyā, likewise, showed greater affection toward her own son than toward Manu.
This verse is not about Pralaya; it belongs to the genealogical narrative that situates Manu within the Solar line, which later becomes important in the broader Matsya Purana’s cosmic-history framework.
It implicitly highlights the ethical problem of favoritism within the household—showing how unequal affection can create conflict in family and succession, themes relevant to dharma and stable governance in Purāṇic polity.
No Vāstu or ritual procedure is stated in this verse; it is a lineage-and-character detail within the Solar dynasty episode rather than a temple-building or rite instruction.