"The sword of the Lord, and of Gideon."
Judges 7:20 · King James Bible
The story
Israel had been oppressed by the Midianites for seven years. God found Gideon — the youngest son of the least family in the tribe of Manasseh — threshing wheat in a winepress to hide it from the enemy. An angel greeted him, "The Lord is with thee, thou mighty man of valour." Gideon was anything but; he answered, "Oh my Lord, wherewith shall I save Israel?"God asked twice for a sign. Both times Gideon laid a fleece of wool on the ground. Once the fleece was wet with dew and the ground was dry; once the fleece was dry and the ground was wet. In each case God did what Gideon asked.
When Gideon marched against the Midianites, his army was 32,000. God said it was too many — "lest Israel vaunt themselves against me, saying, Mine own hand hath saved me." First, everyone afraid was sent home; 22,000 left. Then the men were tested at the water; only 300 lapped water like a dog with the hand to the mouth. Those 300 were Gideon's whole army.
That night the 300 surrounded the Midianite camp with trumpets and torches hidden in clay pitchers. At Gideon's signal they blew the trumpets, smashed the pitchers, held up the flaming torches, and shouted, "The sword of the Lord, and of Gideon!" The Midianite army panicked in the dark, turned on each other, and fled. Israel was delivered.