וְשָׁמְר֗וּ אֶֽת־כָּל־כְּלֵי֙ אֹ֣הֶל מוֹעֵ֔ד וְאֶת־מִשְׁמֶ֖רֶת בְּנֵ֣י יִשְׂרָאֵ֑ל לַעֲבֹ֖ד אֶת־עֲבֹדַ֥ת הַמִּשְׁכָּֽן׃
And they shall keep all the furniture of the tent of meeting, and the charge of the children of Israel, to do the service of the tabernacle.
Read kabbalistic (mystical) interpretation of Numbers 3:8: and classical mystical sources.