Pesachim 94a
Pesachim 94a:9
תָּא שְׁמַע: מִצְרַיִם הָיָה אַרְבַּע מֵאוֹת פַּרְסָה עַל אַרְבַּע מֵאוֹת פַּרְסָה, וּמִצְרַיִם אֶחָד מִשִּׁשִּׁים בְּכוּשׁ, וְכוּשׁ אֶחָד מִשִּׁשִּׁים בָּעוֹלָם, וְעוֹלָם אֶחָד מִשִּׁשִּׁים בַּגָּן, וְגַן אֶחָד מִשִּׁשִּׁים בְּעֵדֶן, וְעֵדֶן אֶחָד מִשִּׁשִּׁים בְּגֵיהִנָּם, נִמְצָא כׇּל הָעוֹלָם כּוּלּוֹ כְּכִיסּוּי קְדֵירָה לְגֵיהִנָּם. תְּיוּבְתָּא.
Come and hear a challenge from a baraita to the previous opinion with regard to the size of the world: The size of Egypt was four hundred parasangs by four hundred parasangs, and Egypt is one-sixtieth of the size of Cush, and Cush is one-sixtieth of the world, and the world is one-sixtieth the size of the Garden of Eden, and the Garden of Eden is one-sixtieth of Eden, and Eden is one sixtieth of the size of Gehenna. Therefore, it is found that the entire world is like a pot cover, which is a small part of the total size of the pot, compared to Gehenna. In any event, based upon the sizes of Egypt and Cush, it is apparent that the entire world is larger than six thousand parasangs. This is indeed a conclusive refutation.