One verse

Srimad Bhagavatam 12.6.24

12.6.24

नैष त्वया मनुष्येन्द्र वधमर्हति सर्पराट् । अनेन पीतममृतमथ वा अजरामर: ॥ २४ ॥

naiṣa tvayā manuṣyendra vadham arhati sarpa-rāṭ anena pītam amṛtam atha vā ajarāmaraḥ

na
not
eṣaḥ
this snake-bird
tvayā
by you
manuṣya-indra
O great ruler of men
vadham
murder
arhati
deserves
sarpa-rāṭ
the king of snakes
anena
by him
pītam
has been drunk
amṛtam
the nectar of the demigods
atha
therefore
vai
certainly
ajara
free from the effects of old age
amaraḥ
virtually immortal

O King among men, it is not fitting that this king of snakes meet death at your hands, for he has drunk the nectar of the immortal demigods. Consequently he is not subject to the ordinary symptoms of old age and death.