Matsya Purana — Glory of Tīrtha-Śrāddha: Best Times
तथा सामलनाथश्च महाशालनदी तथा चक्रवाकं चर्मकोटं तथा जन्मेश्वरं महत् //
tathā sāmalanāthaśca mahāśālanadī tathā cakravākaṃ carmakoṭaṃ tathā janmeśvaraṃ mahat //
Likewise, the holy sites are: Sāmalanātha; the river Mahāśālā; Cakravāka; Carmakoṭa; and the great shrine of Janmeśvara.
This verse does not discuss pralaya; it functions as a catalog of tirthas—named shrines, rivers, and sacred places—highlighting pilgrimage as a dharmic practice.
In the Purāṇic framework, kings and householders support dharma by honoring and maintaining tirthas and by undertaking regulated pilgrimage; this verse supplies the authoritative place-names used for such observances.
The verse signals ritual geography rather than construction rules: named kṣetras like Janmeśvara indicate established linga-shrines where specific worship, vows, and bathing/river rites are traditionally performed.