37 Those who had been in ambush made a sudden dash into Gibeah, spread out and put the whole city to the sword.

Read Judges 20:37 Using Other Translations

And the liers in wait hasted, and rushed upon Gibeah; and the liers in wait drew themselves along, and smote all the city with the edge of the sword.
Then the men in ambush hurried and rushed against Gibeah; the men in ambush moved out and struck all the city with the edge of the sword.
Then those who were hiding rushed in from all sides and killed everyone in the town.