2Ch 2 Chronicles, chapter Second Book of Chronicles, chapter 34
And the men are working faithfully in the business, and over them are appointed Jahath and Obadiah, the Levites, of the sons of Merari, and Zechariah and Meshullam, of the sons of the Kohathite, to overlook; and of the Levites, everyone understanding about instruments of song, 2Ki 12:15