Bible Verses About Trumpet: Calling assemblies

Make thee two trumpets of beaten silver, wherewith thou mayest call together the multitude when the camp is to be removed.

And when thou shalt sound the trumpets, all the multitude shall gather unto thee to the door of the tabernacle of the covenant.

But when the people is to be gathered together, the sound of the trumpets shall be plain, and they shall not make a broken sound.