Matsya Purana — Procedure for Going to Prayaga and the Greatness of the Ganga
पूर्वपार्श्वे तु गङ्गायास् त्रिषु लोकेषु भारत कूपं चैव तु सामुद्रं प्रतिष्ठानं च विश्रुतम् //
pūrvapārśve tu gaṅgāyās triṣu lokeṣu bhārata kūpaṃ caiva tu sāmudraṃ pratiṣṭhānaṃ ca viśrutam //
O Bhārata, on the eastern side of the Gaṅgā there is the famed Samudra-kūpa (the “Ocean Well”), and also Pratiṣṭhāna—both renowned throughout the three worlds.
This verse is not about Pralaya; it functions as tīrtha-māhātmya, mapping sacred geography by naming renowned places associated with the Gaṅgā.
By highlighting celebrated tīrthas, the verse supports the Purāṇic duty of pilgrimage, gifting, and ritual bathing—acts recommended for householders and patronized by kings to uphold dharma and public piety.
Ritually, it identifies specific Gaṅgā-side sacred sites (a ‘well’ and a famed place) suitable for bathing, vows, and offerings; architecturally, it implicitly underscores the importance of water-adjacent sacred topography when selecting and honoring holy locales.