16 He divided the three hundred men into three companies. He gave each man a trumpet and an empty jar, with a torch in the jar. 17 He said, "Watch me and do what I do. When I get to the edge of the camp, do exactly what I do. 18 When I and those with me blow the trumpets, you also, all around the camp, blow your trumpets and shout, 'For God and for Gideon!'" 19 Gideon and his hundred men got to the edge of the camp at the beginning of the middle watch, just after the sentries had been posted. They blew the trumpets, at the same time smashing the jars they carried. 20 All three companies blew the trumpets and broke the jars. They held the torches in their left hands and the trumpets in their right hands, ready to blow, and shouted, "A sword for God and for Gideon!"
Matthew Henry's Commentary on Judges 7:16-20
Commentary on Judges 7:16-22
(Read Judges 7:16-22)
This method of defeating the Midianites may be alluded to, as exemplifying the destruction of the devil's kingdom in the world, by the preaching of the everlasting gospel, the sounding that trumpet, and the holding forth that light out of earthen vessels, for such are the ministers of the gospel, 2 Corinthians 4:6,7. God chose the foolish things of the world to confound the wise, a barley-cake to overthrow the tents of Midian, that the excellency of the power might be of God only. The gospel is a sword, not in the hand, but in the mouth: the sword of the Lord and of Gideon; of God and Jesus Christ, of Him that sits on the throne and the Lamb. The wicked are often led to avenge the cause of God upon each other, under the power of their delusions, and the fury of their passions. See also how God often makes the enemies of the church instruments to destroy one another; it is a pity that the church's friends should ever act like them.