1 Chronicles 16:37-43

Then David left Asaph and the other Levites there in front of the Ark of the Agreement with the LORD. They were to serve there every day. David also left Obed-Edom and sixty-eight other Levites to serve with them. Hosah and Obed-Edom son of Jeduthun were guards. David left Zadok the priest and the other priests who served with him in front of the Tent of the LORD at the place of worship in Gibeon. Every morning and evening they offered burnt offerings on the altar of burnt offerings, following the rules written in the Teachings of the LORD, which he had given Israel. With them were Heman and Jeduthun and other Levites. They were chosen by name to sing praises to the LORD because his love continues forever. Heman and Jeduthun also had the job of playing the trumpets and cymbals and other musical instruments when songs were sung to God. Jeduthun’s sons guarded the gates. Then all the people left. Each person went home, and David also went home to bless the people in his home.