זֹ֣את עֲבֹדַ֗ת מִשְׁפְּחֹת֙ בְּנֵ֣י מְרָרִ֔י לְכָל־עֲבֹדָתָ֖ם בְּאֹ֣הֶל מוֹעֵ֑ד בְּיַד֙ אִֽיתָמָ֔ר בֶּֽן־אַהֲרֹ֖ן הַכֹּהֵֽן׃
This is the service of the families of the sons of Merari, according to all their service, in the tent of meeting, under the hand of Ithamar the son of Aaron the priest.’
Read kabbalistic (mystical) interpretation of Numbers 4:33: and classical mystical sources.