Numbers 10:7-9 Contemporary English Version (CEV)
7 But when you want everyone to come together, sound a different signal on the trumpet. 8 The priests of Aaron’s family will be the ones to blow the trumpets, and this law will never change.
9 Whenever you go into battle against an enemy attacking your land, give a warning signal on the trumpets. Then I, the Lord, will hear it and rescue you.
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.