NET

31 The Benjaminites attacked the army, leaving the city unguarded. They began to strike down their enemy just as they had done before. On the main roads (one leads to Bethel, the other to Gibeah) and in the field, they struck down about thirty Israelites.

Darby

31 And the children of Benjamin went out against the people, and were drawn away from the city, and began to smite of the people, slaying as at the former times, in the highways, of which one leads to Bethel and the other to Gibeah in the field, about thirty men of Israel.

KJV

31 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.