Judges 20:9,10

We will go up by lot against it They probably cast lots who should go, and who should stay at home to provide the necessary supplies. According to all the folly that they have wrought That we may punish them as such wickedness deserves. In Israel This is added as an aggravation, that they should do that in Israel, or among God's peculiar people, which was esteemed abominable even among the heathen. “The abhorrence of the crime” of the Gibeathites “here expressed, and the determination of the Israelites to punish the criminals, were very proper, but they seem to have acted with too much precipitation and resentment. There were with them also sins against the Lord: the abomination of Gibeah was both an evidence and effect of national degeneracy; and it called for deep humiliation and lamentation, that such wickedness had been wrought in Israel, as well as for indignation against the criminals. They ought to have begun with personal and national repentance and reformation; with solemn sacrifices and earnest supplications. This was required in other wars, (Deuteronomy 23:9,) much more in such a war as this.” Scott.