Matsya Purana — The Kauśika Descendants: Śrāddha
तत्रापि ज्ञानवैराग्यात् प्राणानुत्सृज्य धर्मतः लोकैर् अवेक्ष्यमाणास्ते तीर्थान्ते ऽनशनेन तु //
tatrāpi jñānavairāgyāt prāṇānutsṛjya dharmataḥ lokair avekṣyamāṇāste tīrthānte 'naśanena tu //
There too, through spiritual knowledge and dispassion (vairāgya), they righteously relinquished their life-breath; watched by the people, they departed at the end of the tīrtha by fasting (unto death).
This verse is not about cosmic Pralaya; it describes an individual, dharmic exit from life—relinquishing prāṇa through knowledge and dispassion at a sacred tīrtha by fasting.
It implies that society (including kings and householders) should recognize and honor dharmic renunciation: those established in jñāna-vairāgya may lawfully undertake prayopaveśa at a tīrtha, observed and acknowledged by the community.
Ritually, it points to tīrtha-anta as a designated sacred boundary/spot and to anaśana (fasting) as a formal religious observance; it does not prescribe temple architecture but highlights regulated tīrtha practice.