SB 5.24.6
ततोऽधस्ताच्छतयोजनान्तर इयं पृथिवी यावद्धंसभासश्येनसुपर्णादय: पतत्‍त्रिप्रवरा उत्पतन्तीति ॥ ६ ॥
SYNONYMS

tataḥ adhastāt—beneath that; śata-yojana—of one hundred yojanas; antare—by an interval; iyam—this; pṛthivī—planet earth; yāvat—as high as; haṁsa—swans; bhāsa—vultures; śyena—eagles; suparṇa-ādayaḥ—and other birds; patattri-pravarāḥ—the chief among birds; utpatanti—can fly; iti—thus.

TRANSLATION

Below the abodes of the Yakṣas and Rākṣasas by a distance of 100 yojanas [800 miles] is the planet earth. Its upper limits extend as high as swans, hawks, eagles and similar large birds can fly.