'Blow the Trumpet' in the Bible

Declare ye in Judah, and cause it to be heard in Jerusalem, and say, ... and blow the trumpet in the land, cry aloud and say, Assemble yourselves, and let us enter into the fenced cities.

Flee for safety, ye children of Benjamin, out of the midst of Jerusalem, and blow the trumpet in Tekoa, and set up a signal in Beth-haccerem; for evil appeareth out of the north, and a great destruction.

Lift up a banner in the land, blow the trumpet among the nations, prepare nations against her; call together against her the kingdoms of Ararat, Minni, and Ashkenaz; appoint a captain against her; cause the horses to come up as the bristly caterpillars.