Numbers:10:8-9
jps@Numbers:10:8 @ And the sons of Aaron, the priests, shall blow with the trumpets; and they shall be to you for a statute for ever throughout your generations.
jps@Numbers:10:9 @ And when ye go to war in your land against the adversary that oppresseth you, then ye shall sound an alarm with the trumpets; and ye shall be remembered before the LORD your God, and ye shall be saved from your enemies.