Śrīmad-Bhāgavatam · Text 3.2.31
Who is speaking and story frame
विपन्नान् विषपानेन निगृह्य भुजगाधिपम् ।
उत्थाप्यापाययद्गावस्तत्तोयं प्रकृतिस्थितम् ॥ ३१ ॥
vipannān viṣa-pānena
nigṛhya bhujagādhipam
utthāpyāpāyayad gāvas
tat toyaṁ prakṛti-sthitam
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.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.