Numbers 10:7-9 World English Bible (WEB)
7 But when the assembly is to be gathered together, you shall blow, but you shall not sound an alarm.
8 “The sons of Aaron, the priests, shall blow the trumpets. This shall be to you for a statute forever throughout your generations. 9 When you go to war in your land against the adversary who oppresses you, then you shall sound an alarm with the trumpets. Then you will be remembered before Yahweh your God, and you will be saved from your enemies.
Numbers 10:7-9 New International Version (NIV)
7 To gather the assembly, blow the trumpets, but not with the signal for setting out.
8 “The sons of Aaron, the priests, are to blow the trumpets. This is to be a lasting ordinance for you and the generations to come. 9 When you go into battle in your own land against an enemy who is oppressing you, sound a blast on the trumpets. Then you will be remembered by the Lord your God and rescued from your enemies.