Judges 21:4-6

4And the next day the people got up early and built an altar there and offered burnt offerings and peace offerings.

5Then the sons of Israel said, “Which one from all the tribes of Israel did not come up in the assembly to the Lord?” For they had taken a great oath concerning him who did not come up to the Lord at Mizpah, saying, “He shall certainly be put to death.”

6And the sons of Israel felt sorry [and had compassion] for their brother Benjamin and said, “One tribe has been cut off from Israel today.