Judges 20:1-3

1Then all Israel from Dan to Beersheba and from the land of Gilead came together as one and assembled before the Lord in Mizpah.

2The leaders of all the people of the tribes of Israel took their places in the assembly of God’s people, four hundred thousand men armed with swords.

3(The Benjamites heard that the Israelites had gone up to Mizpah.) Then the Israelites said, “Tell us how this awful thing happened.”