Kri.M 102 and 103

त्रिरात्रफलदा नद्यो याः काश्चिदसमुद्रगाः। समुद्रगास्तु पक्षस्य मासस्य सरितां पतिः ॥१०२॥
षण्मासफलदा गोदा वत्सरस्य तु जाह्नवी। विष्णुपादोदकस्यैताः कलां नार्हन्ति षोडशीम् ॥१०३॥

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).