Judges 20:31-32

311When the sons of Benjamin went out against the people, they were lured away from the city, and they began to strike and kill some of the people as at other times, on the roads (one of which goes up to Bethel, and the other to Gibeah), and in the field, about thirty men of Israel.

32And 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.”