1 Chronicles 16:6
and Benaiah and Jahaziel the priests were to blow trumpets regularly before the ark of the covenant of God.
Numbers 10:8
And the sons of Aaron, the priests, shall blow the trumpets. The trumpets shall be to you for a perpetual statute throughout your generations.
2 Chronicles 5:12-13
and all the Levitical singers, Asaph, Heman, and Jeduthun, their sons and kinsmen, arrayed in fine linen, with cymbals, harps, and lyres, stood east of the altar with 120 priests who were trumpeters;
2 Chronicles 13:12
Behold, God is with us at our head, and his priests with their battle trumpets 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."
2 Chronicles 29:26-28
The Levites stood with the instruments of David, and the priests with the trumpets.