Judges 20:29-31

This time Israel placed men in ambush all around Gibeah. On the third day when Israel set out, they took up the same positions before the Benjaminites as before. When the Benjaminites came out to meet the army, they moved out from the city. Benjaminites began to cut down some of the troops just as they had before. About thirty men fell in the field and on the roads to Bethel and Gibeah.