|Canto 5: The Creative Impetus||Chapter 24: The Subterranean Heavenly Planets|
Bhaktivedanta VedaBase: Śrīmad Bhāgavatam 5.24.6
tato 'dhastāc chata-yojanāntara iyaḿ pṛthivī yāvad dhaḿsa-bhāsa-śyena-suparṇādayaḥ patattri-pravarā utpatantīti
tataḥ adhastāt — beneath that; śata-yojana — of one hundred yojanas; antare — by an interval; iyam — this; pṛthivī — planet earth; yāvat — as high as; haḿsa — swans; bhāsa — vultures; śyena — eagles; suparṇa-ādayaḥ — and other birds; patattri-pravarāḥ — the chief among birds; utpatanti — can fly; iti — thus.
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.
Copyright © The Bhaktivedanta Book Trust International, Inc.
His Divine Grace A. C. Bhaktivedanta Swami Prabhupāda, Founder Ācārya of the International Society for Krishna Consciousness