1 Chronicles 15:24
24 Shebaniah, Joshaphat, Nethanel, Amasai, Zechariah, Benaiah, and Eliezer, the priests, dshould blow the trumpets before the ark of God. Obed-edom and Jehiah were to be gatekeepers for the ark.
2 Chronicles 13:12
12 Behold, God is with us at our head, and his priests with their battle vtrumpets to sound the call to battle against you. O sons of Israel, do not fight against the Lord, the God of your fathers, for you cannot succeed.”