All the Levites who were musicians— Asaph, Heman, Jeduthun and their sons and relatives— stood on the east side of the altar, dressed in fine linen and playing cymbals, harps and lyres. They were accompanied by 120 priests sounding trumpets.The trumpeters and musicians joined in unison to give praise and thanks to the Lord. Accompanied by trumpets, cymbals and other instruments, the singers raised their voices in praise to the Lord and sang:“ He is good; his love endures forever.” Then the temple of the Lord was filled with the cloud, (niv)
God is with us; he is our leader. His priests with their trumpets will sound the battle cry against you. People of Israel, do not fight against the Lord, the God of your ancestors, for you will not succeed.” (niv)
So the Levites stood ready with David’s instruments, and the priests with their trumpets.Hezekiah gave the order to sacrifice the burnt offering on the altar. As the offering began, singing to the Lord began also, accompanied by trumpets and the instruments of David king of Israel.The whole assembly bowed in worship, while the musicians played and the trumpets sounded. All this continued until the sacrifice of the burnt offering was completed. (niv)