Numbers 10:9-10

EJ2000(i) 9 And when ye go to war in your land against the enemy that oppresses you, then ye shall blow an alarm with the trumpets; and ye shall be remembered before the LORD your God, and ye shall be saved from your enemies. 10 Also in the day of your gladness and in your solemn days and in the beginnings of your months, ye shall blow the trumpets over your burnt offerings and over the sacrifices of your peace, that they may be to you for a memorial before your God; I AM your God.