1 Chronicles 16:37-42
37 David left Asaph and his associates before the ark of the covenant of the Lord to minister there regularly, according to each day’s requirements.
38 He also left Obed-Edom and his sixty-eight associates to minister with them. Obed-Edom son of Jeduthun, and also Hosah, were gatekeepers.
39 David left Zadok the priest and his fellow priests before the tabernacle of the Lord at the high place in Gibeon
40 to present burnt offerings to the Lord on the altar of burnt offering regularly, morning and evening, in accordance with everything written in the Law of the Lord, which he had given Israel.
41 With them were Heman and Jeduthun and the rest of those chosen and designated by name to give thanks to the Lord, “for his love endures forever.”
42 Heman and Jeduthun were responsible for the sounding of the trumpets and cymbals and for the playing of the other instruments for sacred song. The sons of Jeduthun were stationed at the gate.