Judges 7:8

7:8 The men who were chosen took supplies and their trumpets. Gideon sent all the men of Israel back to their homes; he kept only three hundred men. Now the Midianites were camped down below in the valley.

Judges 7:18-22

7:18 When I and all who are with me blow our trumpets, you also blow your trumpets all around the camp. Then say, ‘For the Lord and for Gideon!’”

7:19 Gideon took a hundred men to the edge of the camp at the beginning of the middle watch, just after they had changed the guards. They blew their trumpets and broke the jars they were carrying. 7:20 All three units blew their trumpets and broke their jars. They held the torches in their left hand and the trumpets in their right. Then they yelled, “A sword for the Lord and for Gideon!” 7:21 They stood in order all around the camp. The whole army ran away; they shouted as they scrambled away. 7:22 When the three hundred men blew their trumpets, the Lord caused the Midianites to attack one another with their swords throughout the camp. The army fled to Beth Shittah on the way to Zererah. They went to the border of Abel Meholah near Tabbath.