'Blow the Trumpet' in the Bible

When I blow the trumpet, I and all that are with me, then blow ye the trumpets also on every side of all the camp, and say, For Jehovah and for Gideon.

and the three hundred blow the trumpets, and Jehovah setteth the sword of each against his companion, even through all the camp; and the camp fleeth unto Beth-Shittah, at Zererath, unto the border of Abel-Meholah, by Tabbath.