Numbers 10:2

Make two silver trumpets . Of hammered work you shall make them, and you shall use them for summoning the congregation and for breaking camp .

“Make two trumpets of hammered silver, and use them for calling the community together and for having the camps set out.

Make thee two trumpets of silver; of a whole piece shalt thou make them: that thou mayest use them for the calling of the assembly, and for the journeying of the camps.