The inhabitants of Vṛndāvana were perplexed by great difficulties because a certain portion of the Yamunā was poisoned by the chief of the reptiles [Kāliya]. The Lord chastised the snake-king within the water and drove him away, and after coming out of the river, He caused the cows to drink the water and proved that the water was again in its natural state.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
विपन्नान्विषपानेन निगृह्य भुजगाधिपम् । उत्थाप्यापाययद्गावस्तत्तोयं प्रकृतिस्थितम्
vipannānviṣapānena nigṛhya bhujagādhipam | utthāpyāpāyayadgāvastattoyaṃ prakṛtisthitam
SB 3.2.31