Matsyapurana 110.15

110.15

maharṣīṇāmidaṃ guhyaṃ sarvapāpapraṇāśanam
adhītya ca dvijo 'pyetan nirmalaḥ svargamāpnuyāt //

Know this to be the truth. The good should din it into the ears of their friends, pupils and the servants, that Prayâga is blessed, is the giver of heaven, is the very personification of bliss and truth; is sacred, and is the giver of Dharma, the dispeller of all sins, and is not (fully) known even to the great sages. The twice born by reading this Mahâtyma become purified and go to heaven.—13-15.