Reference for Pesachim 187:12

תדע שבחמש חמה במזרח ובשבע חמה במערב חצי שש וחצי שבע חמה עומדת בראש כל אדם תיובתא

This is [indeed] a refutation.<span class="x" onmousemove="('comment',' For according to the present calculation the surface area of the world is 576,000,000 sq. parasangs (thus: 400 X 400 X 60 x 60) whereas according to Raba, even if the 6000 is squared, we have only 36,000,000 sq. parasangs.');">¹⁵</span> Come and hear: Tanna debe Eliyahu<span class="x" onmousemove="('comment',' This is a Midrash consisting of two parts, 'Seder Eliyahu Rabbah' and 'Seder Eliyahu Zuta'. According to the Talmud Keth. ');">¹⁶</span>

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