'Blow the Trumpet' in the Bible

But when you blow the trumpet to assemble the whole congregation, don't use the same sound as you do for sounding an alarm.

And the sons of Aaron, the priests, shall blow the trumpets; and they shall be to you for a statute for ever throughout your generations.

Also in the day of your gladness, and in your set feasts, and in the beginnings of your months, ye shall blow the trumpets over your burnt-offerings, and over the sacrifices of your peace-offerings; and they shall be to you for a memorial before your God: I am Jehovah your God.