Ezekiel 42:18 Midrash

אֵ֛ת ר֥וּחַ הַדָּר֖וֹם מָדָ֑ד חֲמֵשׁ־מֵא֥וֹת קָנִ֖ים בִּקְנֵ֥ה הַמִּדָּֽה׃

He measured the south side, five hundred reeds, with the measuring reed.

Read midrashic interpretation of Ezekiel 42:18: and classical rabbinic exegesis.