Kri.M 102 and 103

trirātraphaladā nadyō yāḥ kāścidasamudragāḥ। samudragāstu pakṣasya māsasya saritāṁ patiḥ ॥102॥
ṣaṇmāsaphaladā gōdā vatsarasya tu jāhnavī। viṣṇupādōdakasyaitāḥ kalāṁ nārhanti ṣōḍaśīm ॥103॥

Submerging yourself in rivers which don't join the ocean gives results of three day sacrifice. Those which join the ocean give half-month results, and the ocean gives one-month results. River Gōdāvari gives six months results and river Ganga gives one-year results of sacrifice. All these together are not equal to 1\16th of the results got by Lord Vishnu's Pādōdaka (water offered to the lotus feet of Lord Hari).