The Lord spoke to Moses:
References for Numbers 10:1
"Make two trumpets of hammered silver to summon the community and have the camps set out.
References for Numbers 10:2
When both are sounded in long blasts, the entire community is to gather before you at the entrance to the tent of meeting.
However, if one is sounded, only the leaders, the heads of Israel's clans, are to gather before you.
References for Numbers 10:4
"When you sound short blasts, the camps pitched on the east are to set out.
References for Numbers 10:5
When you sound short blasts a second time, the camps pitched on the south are to set out. Short blasts are to be sounded for them to set out.
References for Numbers 10:6
When calling the assembly together, you are to sound long blasts, not short ones.
The sons of Aaron, the priests, are to sound the trumpets. Your use of these is a permanent statute throughout your generations.
"When you enter into battle in your land against an adversary who is attacking you, sound short blasts on the trumpets, and you will be remembered before the Lord your God and be delivered from your enemies.
References for Numbers 10:9
You are to sound the trumpets over your burnt offerings and your fellowship sacrifices and on your joyous occasions, your appointed festivals, and the beginning of each of your months. They will serve as a reminder for you before your God: I am the Lord your God."
References for Numbers 10:10