Judges 20:30 (KJV)

And Phinehas, the son of Eleazar, the son of Aaron, stood before it in those days,) saying, Shall I yet again go out to battle against the children of Benjamin my brother, or shall I cease? And the Lord said, Go up; for to morrow I will deliver them into thine hand.

And Israel set liers in wait round about Gibeah.

And the children of Israel went up against the children of Benjamin on the third day, and put themselves in array against Gibeah, as at other times.

And the children of Benjamin went out against the people, and were drawn away from the city; and they began to smite of the people, and kill, as at other times, in the highways, of which one goeth up to the house of God, and the other to Gibeah in the field, about thirty men of Israel.

And the children of Benjamin said, They are smitten down before us, as at the first. But the children of Israel said, Let us flee, and draw them from the city unto the highways.