The men worked faithfully. Their supervisors were Jahath and Obadiah. Jahath and Obadiah were Levites, and they were descendants of Merari. Other supervisors were Zechariah and Meshullam. They were descendants of Kohath. The Levites who were skilled in playing instruments of music also supervised the laborers and all the other workers. Some Levites worked as secretaries, officials, and doorkeepers.