Joshua 18:18 Midrash

וְעָבַ֛ר אֶל־כֶּ֥תֶף מוּל־הָֽעֲרָבָ֖ה צָפ֑וֹנָה וְיָרַ֖ד הָעֲרָבָֽתָה׃

And it passed along to the side over against the Arabah northward, and went down unto the Arabah.

Read midrashic interpretation of Joshua 18:18: and classical rabbinic exegesis.