One verse

Srimad Bhagavatam 10.89.53

10.89.53

तस्मिन् महाभोगमनन्तमद्भ‍ुतं सहस्रमूर्धन्यफणामणिद्युभि: । विभ्राजमानं द्विगुणेक्षणोल्बणं सिताचलाभं शितिकण्ठजिह्वम् ॥ ५३ ॥

tasmin mahā-bhogam anantam adbhutaṁ sahasra-mūrdhanya-phaṇā-maṇi-dyubhiḥ vibhrājamānaṁ dvi-guṇekṣaṇolbaṇaṁ sitācalābhaṁ śiti-kaṇṭha-jihvam

tasmin
there
mahā
huge
bhogam
a serpent
anantam
Lord Ananta
adbhutam
amazing
sahasra
thousand
mūrdhanya
on His heads
phaṇā
upon the hoods
maṇi
of the gems
dyubhiḥ
with the rays of effulgence
vibhrājamānam
shining
dvi
twice
guṇa
as many
īkṣaṇa
whose eyes
ulbaṇam
frightening
sita
white
acala
the mountain (namely Kailāsa)
ābham
whose resemblance
śiti
dark blue
kaṇṭha
whose necks
jihvam
and tongues

In that palace was the huge, awe-inspiring serpent Ananta Śeṣa. He shone brilliantly with the radiance emanating from the gems on His thousands of hoods and reflecting from twice as many fearsome eyes. He resembled white Mount Kailāsa, and His necks and tongues were dark blue.