Numbers 10:2 in the King James Version
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.
Context
1 The LORD spoke to Moses, saying,
2 “Make two trumpets of silver. You shall make them of beaten work. You shall use them for the calling of the congregation and for the journeying of the camps.
3 When they blow them, all the congregation shall gather themselves to you at the door of the Tent of Meeting.