Beha’aloscha
In Parashat Beha’aloscha, YHVH instructs Moses on how to make two silver trumpets, they are to be hammered out and they are to be used for summoning of the assembly and to cause the camps to journey.
Blasts:
A long blast with both trumpets — the entire assembly shall assemble to you, to the entrance of the Tent of Meeting.
A long blast with one trumpet — the leaders shall assemble to you, the heads of Israel’s thousands.
Short blasts, the camps resting to the east shall journey. Short blasts a second time the camps to the south shall journey. Short blast shall they sound for their journeys.
When you gather together the congregation you shall sound a long blast but not a short blast.
The sons of Aaron, the Kohanim, shall sound the trumpets, and it shall be for you an eternal decree for your generations.
When you go to wage war in your Land against an enemy who oppresses you, you shall sound short blasts of the trumpets, and you shall be recalled before YHVH, your God and you shall be saved from your foes.
On a day of your gladness, and on your festivals, and on your new moons, you shall sound the trumpets over your burnt-offerings and over your feast peace-offerings; and they shall be a remembrance for you before your God; I am YHVH, your God.