The men of Israel had taken an oath at Mizpah: “Not one of us will give his daughter in marriage to a Benjamite.”
References for Judges 21:1
The people went to Bethel, where they sat before God until evening, raising their voices and weeping bitterly.
References for Judges 21:2
“LORD, God of Israel,” they cried, “why has this happened to Israel? Why should one tribe be missing from Israel today?”
References for Judges 21:3
Early the next day the people built an altar and presented burnt offerings and fellowship offerings.
References for Judges 21:4
Then the Israelites asked, “Who from all the tribes of Israel has failed to assemble before the LORD?” For they had taken a solemn oath that anyone who failed to assemble before the LORD at Mizpah was to be put to death.
References for Judges 21:5
Now the Israelites grieved for the tribe of Benjamin, their fellow Israelites. “Today one tribe is cut off from Israel,” they said.
“How can we provide wives for those who are left, since we have taken an oath by the LORD not to give them any of our daughters in marriage?”
References for Judges 21:7