Matsya Purana — Glory of Prayaga: The Fruit of the Anashaka Fast and the Merit of the Yamuna
उत्तरेण प्रवक्ष्यामि आदित्यस्य महात्मनः तीर्थं निरञ्जनं नाम यत्र देवाः सवासवाः //
uttareṇa pravakṣyāmi ādityasya mahātmanaḥ tīrthaṃ nirañjanaṃ nāma yatra devāḥ savāsavāḥ //
Now, further to the north, I shall describe the sacred tīrtha of the great-souled Āditya, called Nirañjana, where the gods, together with Indra, are present.
This verse does not discuss Pralaya; it belongs to a tīrtha-māhātmya context, emphasizing sacred geography—especially a Sun-associated pilgrimage site where divine presence is affirmed.
It supports the Purāṇic duty of dharmic living through tīrtha-yātrā: a king or householder is encouraged to honor sacred places, perform vows and bathing/offerings there, and uphold public religion by recognizing sites tied to major deities like Āditya.
Ritually, it points to a tīrtha named Nirañjana associated with Āditya, implying practices like snāna (sacred bathing) and offerings to the Sun; no explicit Vāstu or temple-construction rule is stated in this verse.