Judges 21:1-5

Now the men of Israel had sworn in Mizpah, saying, “None of us shall give his daughter to Benjamin in marriage.”

So the people came to Bethel and sat there before God until evening, and raised their voices and wept profusely.

And they said, “Why, Lord, God of Israel, has this happened in Israel, that one tribe is missing today from Israel?”

And it came about the next day that the people got up early and built an altar there, and offered burnt offerings and peace offerings.

Then the sons of Israel said, “Who is there among all the tribes of Israel who did not go up to the Lord in the assembly?” For they had taken a solemn oath concerning anyone who did not go up to the Lord at Mizpah, saying, “He shall certainly be put to death.”