Then the Israelites asked, "Who from all the tribes of Israel1 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 should certainly be put to death.
References for Judges 21:5
Now the Israelites grieved for their brothers, the Benjamites. "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 oath2 by the LORD not to give them any of our daughters in marriage?"
References for Judges 21:7
Then they asked, "Which one of the tribes of Israel failed to assemble before the LORD at Mizpah?" They discovered that no one from Jabesh Gilead3 had come to the camp for the assembly.
References for Judges 21:8
For when they counted the people, they found that none of the people of Jabesh Gilead were there.
So the assembly sent twelve thousand fighting men with instructions to go to Jabesh Gilead and put to the sword those living there, including the women and children.
"This is what you are to do," they said. "Kill every male4 and every woman who is not a virgin.5"
References for Judges 21:11