Matsya Purana — Procedure for Going to Prayaga and the Greatness of the Ganga
तत्राभिषेकं यः कुर्यात् संगमे शंसितव्रतः तुल्यं फलमवाप्नोति राजसूयाश्वमेधयोः //
tatrābhiṣekaṃ yaḥ kuryāt saṃgame śaṃsitavrataḥ tulyaṃ phalamavāpnoti rājasūyāśvamedhayoḥ //
Whoever performs the ritual ablution (abhiṣeka) there, at the sacred confluence (saṅgama), observing a duly proclaimed vow, attains a reward equal to that of the Rājasūya and the Aśvamedha sacrifices.
This verse does not describe pralaya; it focuses on tīrtha-mahātmya—how a disciplined abhiṣeka at a sacred saṅgama yields extraordinary religious merit.
It offers an accessible dharmic alternative: by observing a proper vow and performing abhiṣeka at a saṅgama, even householders (and kings) can gain merit comparable to major royal sacrifices, emphasizing disciplined practice over costly ritual power.
The ritual point is central: abhiṣeka (ceremonial bathing/anointing) performed at a saṅgama, together with a vrata, is declared as highly efficacious—equal in fruit to Rājasūya and Aśvamedha.