Revelation 8:2

And I saw the seven angels who stand before God, and to them were given seven trumpets.

·        And to them were given seven trumpets: In the Old Testament, trumpets sounded the alarm for war, and threw the enemy into a panic, or they called an assembly of God’s people.  (DG)

·        These seven trumpets will sound as God’s battle-alarm during the great tribulation. (DG)

2 Chronicles 29:25-28  … So all the assembly worshiped, the singers sang, and the trumpeters sounded; all this continued until the burnt offering was finished.

Joshua 6:4  And seven priests shall bear seven trumpets of rams’ horns before the ark.  But the seventh day you shall march around the city seven times, and the priests shall blow the trumpets.