Matsya Purana — The Greatness of Prayaga and the Supremacy of Cow-Donation
व्याधितो यदि वा दीनो वृद्धो वापि भवेन्नरः गङ्गायमुनयोर्मध्ये यस्तु प्राणान्परित्यजेत् //
vyādhito yadi vā dīno vṛddho vāpi bhavennaraḥ gaṅgāyamunayormadhye yastu prāṇānparityajet //
Whether a man is afflicted with illness, or is destitute, or has grown old—whoever relinquishes his life in the region between the Gaṅgā and the Yamunā attains exceptional sacred merit.
This verse does not discuss pralaya; it teaches tirtha-mahatmya—how a sacred location (between the Gaṅgā and Yamunā) is believed to confer extraordinary spiritual merit at the time of death.
It supports the householder ethic of seeking auspicious rites and holy places, especially in old age, poverty, or illness—encouraging pilgrimage and end-of-life spiritual preparation within dharma.
The ritual focus is on kṣetra-māhātmya: the sanctity of the Gaṅgā–Yamunā confluence region and the belief in heightened efficacy of final rites and death in that sacred zone, rather than on Vāstu or temple-building rules.