Judges 20:7

Behold, ye are all children of Israel
The descendants of one man that feared the Lord; were of one nation, and of one religion, men professing godliness, and therefore ought to bear testimony against sin and wickedness of every sort, and especially such crying abominations as these:

give your advice and counsel:
in this place, being assembled together on this occasion; consult what is best to be done, and let every man speak his mind freely what step he thinks should be taken for the glory of God, and honour of religion, and to bring such persons to justice who had committed so foul a fact.