One verse

Srimad Bhagavatam 2.7.28

2.7.28

यद् वै व्रजे व्रजपशून् विषतोयपीतान् पालांस्त्वजीवयदनुग्रहद‍ृष्टिवृष्टय‍ा । तच्छुद्धयेऽतिविषवीर्यविलोलजिह्व- मुच्चाटयिष्यदुरगं विहरन् ह्रदिन्याम् ॥ २८ ॥

yad vai vraje vraja-pasun visatoya-pitan palams tv ajivayad anugraha-drsti-vrstya tac-chuddhaye ’ti-visa-virya-vilola-jihvam uccatayisyad uragam viharan hradinyam

yat
one who
vai
certainly
vraje
at Vrndavana
vraja-pasun
the animals thereof
visa-toya
poisoned water
pitan
those who drank
palan
the cowherd men
tu
also
ajivayat
brought to life
anugraha-drsti
merciful glance
vrstya
by the showers of
tat
that
suddhaye
for purification
ati
exceedingly
visa-virya
highly potent poison
vilola
lurking
jihvam
one who has such a tongue
uccatayisyat
severely punished
uragam
unto the snake
viharan
taking it as a pleasure
hradinyam
in the river

Then also when the cowherd boys and their animals drank the poisoned water of the River Yamuna, and after the Lord (in His childhood) revived them by His merciful glance, just to purify the water of the River Yamuna He jumped into it as if playing and chastised the venomous Kaliya snake, which was lurking there, its tongue emitting waves of poison. Who can perform such herculean tasks but the Supreme Lord ?