וְהִקְרַבְתָּ֙ אֶת־הַלְוִיִּ֔ם לִפְנֵ֖י אֹ֣הֶל מוֹעֵ֑ד וְהִ֨קְהַלְתָּ֔ אֶֽת־כָּל־עֲדַ֖ת בְּנֵ֥י יִשְׂרָאֵֽל׃
And thou shalt present the Levites before the tent of meeting; and thou shalt assemble the whole congregation of the children of Israel.
Read midrashic interpretation of Numbers 8:9: and classical rabbinic exegesis.