One verse

Srimad Bhagavatam 5.20.37

5.20.37

स लोकत्रयान्ते परित ईश्वरेण विहितो यस्मात्सूर्यादीनां ध्रुवापवर्गाणां ज्योतिर्गणानां गभस्तयोऽर्वाचीनांस्त्रींल्लोकानावितन्वाना न कदाचित्पराचीना भवितुमुत्सहन्ते तावदुन्नहनायाम: ॥ ३७ ॥

sa loka-trayante parita isvarena vihito yasmat suryadinam dhruvapavarganam jyotir-gananam gabhastayo ’rvacinams tril lokan avitanvana na kadacit paracina bhavitum utsahante tavad un-nahanayamah.

sah
that mountain
loka-traya-ante
at the end of the three lokas (Bhurloka, Bhuvarloka and Svarloka)
paritah
all around
isvarena
by the Supreme Personality of Godhead, Krsna
vihitah
created
yasmat
from which
surya-adinam
of the sun planet
dhruva-apavarganam
up to Dhruvaloka and other, inferior luminaries
jyotih-gananam
of all the luminaries
gabhastayah
the rays
arvacinan
on this side
trin
the three
lokan
planetary systems
avitanvanah
spreading throughout
na
not
kadacit
at any time
paracinah
beyond the jurisdiction of that mountain
bhavitum
to be
utsahante
are able
tavat
that much
unnahana-ayamah
the measure of the height of the mountain

By the supreme will of Krsna, the mountain known as Lokaloka has been installed as the outer border of the three worlds—Bhurloka, Bhuvarloka and Svarloka—to control the rays of the sun throughout the universe. All the luminaries, from the sun up to Dhruvaloka, distribute their rays throughout the three worlds, but only within the boundary formed by this mountain. Because it is extremely high, extending even higher than Dhruvaloka, it blocks the rays of the luminaries, which therefore can never extend beyond it.