Matsya Purana 193.85

193.85

aparapakṣe tvamāyāntu snānaṃ tatra samācaret.
brāhmaṇaṃ bhojayedekaṃ koṭirbhavati bhojitā .. 193.86

Then the sacred Sakhî tîrtha should be visited where the charities performed multiply infinitely. One who feeds a single Brâhmaṇa there after bathing on the Amâvasyâ day gets the benefit of having fed a crore of them.—85-86