וּֽלְמַחְלְקוֹת֙ הַכֹּהֲנִ֣ים וְהַלְוִיִּ֔ם וּֽלְכָל־מְלֶ֖אכֶת עֲבוֹדַ֣ת בֵּית־יְהוָ֑ה וּֽלְכָל־כְּלֵ֖י עֲבוֹדַ֥ת בֵּית־יְהוָֽה׃
還有祭司和利未人的班次、永恆者殿中一切事奉的工作，以及永恆者殿中一切事奉所用的器皿。
Rashi
engage in the work i.e., in their work; this one to sing, and that one to guard the gates, every man to his work, as David prepared it.