Matsya Purana 193.16

193.16

śrāvaṇe tarpaṇaṃ kṛtvā mucyate ca ṛṇatrayāt.
gaṅgeśvarasamīpe tu gaṅgāvadanamuttamam .. 193.15

Besides these one should go to the sacred Ṛisi tirtha In ancient times the sage Tṛiṇavindu overpowered by his ills fixed up his abode there By the glory of the tirtha he was liberated from his ills as well as from the effects of the curses pronounced upon him Afterwards Gangeśvara tirtha should also be visited Those who bathe there on the 14th day of the dark fortnight during the month of Śrâvana go to Rudraloka One who offers libations of water to the manes is liberated from all the three debts. The most beautiful Gaṅgâvadana tirtha is close to Gangeśvara where by bathing one is undoubtedly freed from all his sins—13-17