Ezekiel 42:19 Midrash

סָבַ֖ב אֶל־ר֣וּחַ הַיָּ֑ם מָדַ֛ד חֲמֵשׁ־מֵא֥וֹת קָנִ֖ים בִּקְנֵ֥ה הַמִּדָּֽה׃

He turned about to the west side, and measured five hundred reeds with the measuring reed.

Read midrashic interpretation of Ezekiel 42:19: and classical rabbinic exegesis.