Matsya Purana — Glory of Tīrtha-Śrāddha: Best Times
यत्रास्ते नारसिंहस्तु स्वयमेव जनार्दनः तीर्थमिक्षुमती नाम पितॄणां वल्लभं सदा //
yatrāste nārasiṃhastu svayameva janārdanaḥ tīrthamikṣumatī nāma pitṝṇāṃ vallabhaṃ sadā //
Where Nārasiṃha—Janārdana Himself—abides, there is a tīrtha called Ikṣumatī, ever beloved of the Pitṛs, the ancestral spirits.
This verse does not describe pralaya; it functions as tirtha-mahātmya, highlighting a sacred place made potent by the presence of Narasimha (Vishnu).
By calling the place “beloved of the Pitṛs,” it implies suitability for ancestral rites (śrāddha/tarpaṇa). A householder’s dharma includes honoring ancestors, and a king supports such dharma by protecting and patronizing tirthas.
Ritually, the key point is Pitṛ-priya tirtha—an auspicious site for offerings to ancestors. Architecturally, it indirectly signals a Narasimha-kshetra (a Vishnu/Narasimha sacred precinct) around which temples and pilgrimage infrastructure are traditionally established.