One verse

Srimad Bhagavatam 2.5.38

2.5.38

भूर्लोक: कल्पित: पद्‍भ्यां भुवर्लोकोऽस्य नाभित: । हृदा स्वर्लोक उरसा महर्लोको महात्मन: ॥ ३८ ॥

bhurlokah kalpitah padbhyam bhuvarloko ’sya nabhitah hrda svarloka urasa maharloko mahatmanah

bhuh
the lower planetary systems up to the stratum of the earth
lokah
the planets
kalpitah
it is so imagined or said
padbhyam
out of the legs
bhuvah
the upper
lokah
the planetary system
asya
of Him (the Lord)
nabhitah
from the navel abdomen
hrda
by the heart
svarlokah
the planetary systems occupied by the demigods
urasa
by the chest
maharlokah
the planetary system occupied by great sages and saints
maha-atmanah
of the Supreme Personality of Godhead

The lower planeary systems, up to the limit of the earthly stratum, are said to be situated in His legs. The middle planeary systems, beginning from Bhuvarloka, are situated in His navel. And the still higher planeary systems, occupied by the demigods and highly cultured sages and saints, are situated in the chest of the Supreme Lord.