Judges 20:32-36

And the sons of Benjamin said, “They are defeated before us, like the first time.” But the sons of Israel said, “Let’s flee, so that we may draw them away from the city to the roads.”

Then all the men of Israel rose from their place and lined up at Baal-tamar; and the men of Israel in ambush charged from their place, from Maareh-geba.

When ten thousand choice men from all Israel came against Gibeah, the battle became fierce; but Benjamin did not know that disaster was close to them.

And the Lord struck Benjamin before Israel, so that the sons of Israel destroyed 25,100 men of Benjamin that day, all who drew the sword.

So the sons of Benjamin saw that they were defeated. When the men of Israel gave ground to Benjamin because they relied on the men in ambush whom they had set against Gibeah,