One verse

Srimad Bhagavatam 5.24.6

5.24.6

ततोऽधस्ताच्छतयोजनान्तर इयं पृथिवी यावद्धंसभासश्येनसुपर्णादय: पतत्‍त्रिप्रवरा उत्पतन्तीति ॥ ६ ॥

tato ’dhastac chata-yojanantara iyam prthivi yavad dhamsa-bhasa-syena-suparnadayah patattri-pravara utpatantiti.

tatah adhastat
beneath that
sata-yojana
of one hundred yojanas
antare
by an interval
iyam
this
prthivi
plane earth
yavat
as high as
hamsa
swans
bhasa
vultures
syena
eagles
suparna-adayah
and other birds
patattri-pravarah
the chief among birds
utpatanti
can fly
iti
thus.

Below the abodes of the Yaksas and Raksasas by a distance of 100 yojanas (800 miles) is the plane earth. Its upper limits extend as high as swans, hawks, eagles and similar large birds can fly.