Bible Verses About Trumpet used for Calling Assemblies

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.

And when they shall blow with them, all the assembly shall assemble themselves to thee at the door of the tabernacle of the congregation.

But when the congregation is to be gathered together, ye shall blow, but ye shall not sound an alarm.