Matsya Purana — The Greatness of Prayaga: Manasa Tirtha
गवां शतसहस्रस्य सम्यग्दत्तस्य यत्फलम् प्रयागे माघमासे तु त्र्यहस्नानात्तु तत्फलम् //
gavāṃ śatasahasrasya samyagdattasya yatphalam prayāge māghamāse tu tryahasnānāttu tatphalam //
Whatever merit arises from properly gifting one hundred thousand cows—that very merit is obtained by bathing for three days at Prayāga during the month of Māgha.
This verse is not about pralaya; it belongs to tirtha-mahātmya and teaches that pilgrimage-bathing at Prayāga in Māgha yields immense religious merit comparable to major gifts.
It frames an accessible dharmic alternative to costly charity: a householder (or king) who cannot perform massive go-dāna can still gain equivalent merit through disciplined, rule-based bathing at a major tirtha during Māgha.
The ritual point is snāna-vidhi: a three-day bath (try-aha-snāna) at Prayāga in Māgha is presented as a high-yield observance, emphasizing correct timing (Māgha) and sacred location (Prayāga).