1 Chronicles 16:39-42

39and Zadok the priest, and his brethren the priests, before the tabernacle of the LORD in the high place that was at Gibeon,

40to offer burnt offerings unto the LORD upon the altar of burnt offering continually morning and evening, even according to all that is written in the law of the LORD, which he commanded unto Israel;

41and with them Heman and Jeduthun, and the rest that were chosen, who were expressed by name, to give thanks to the LORD, because his mercy endureth for ever;

42and with them Heman and Jeduthun with trumpets and cymbals for those that should sound aloud, and with instruments for the songs of God: and the sons of Jeduthun to be at the gate.