Srimad Bhagvata Mahapurana: Book 10: Chapter 16: Verses 60-67
Sri Suka went on : Hearing this (prayer), the almighty Lord, who had assumed a human semblance on purpose replied, "You ought not to stay here, 0 serpent! Accompanied by your kinsfolk, progeny and wives, proceed you to the ocean without delay; let the river be used by the bovine race and human beings. The mortal who duly remembers this command of Mine to you, reciting it both morning and evening, shall not have fear from you (serpents). He who having bathed in this pool, the scene of My sport, propitiates the gods and others with (its) water and, observing a fast, offers worship to Me, thinking of Me (all the time), is completely absolved of all sins. That Garuda (lit., he who is endowed with beautiful wings) for fear of whom you took shelter in this pool, leaving the island of Ramanaka, shall not devour you, marked as you are with My footprints." Sri Suka continued : Commanded thus by Lord Sri Krsna of wonderful deed, Kaliya as well as his wives devoutly worshipped Him with joy by means of unearthly raiment, garlands and gems as well as with superb jewels, heavenly perfumes, sandal paste and a large wreath of lotuses. Having worshipped Sri Krsna (the Ruler of the universe) and propitiated the Lord whose banner bears the device of Garuda and duly permitted by Him, Kaliya thereupon went round Him (as a mark of respect) and greeted Him and accompanied by his wives, kinsfolk and sons gladly withdrew to the island of Ramanaka in the ocean, so the tradition goes: Rid of poison, the water of the Yamuna presently became nectar-like (again) by the grace of the Lord who had sportively assumed the semblance of a human being.
Thus ends the sixteenth discourse entitled "Deliverance of Kaliya," in the first half of Book Ten of the great and glorious Bhagavata-Purana, otherwise known as the Paramahamsa-Samhita.iv>