וַיְצַ֤ו מֹשֶׁה֙ אֶת־הַלְוִיִּ֔ם נֹ֥שְׂאֵ֛י אֲר֥וֹן בְּרִית־יְהוָ֖ה לֵאמֹֽר׃
that Moses commanded the Levites, that bore the ark of the covenant of the LORD, saying:
Read midrashic interpretation of Deuteronomy 31:25: and classical rabbinic exegesis.