Judges 21:15
And the people repented them for Benjamin, because that the Lord had made a breach in the tribes of Israel.
Cross-reference
Judges 21:6
Parallel
Judges 21:6 records the same repentance for Benjamin that is repeated in 21:15, both mourning the tribe's near destruction.
Judges 21:17
Historical context
In Judges 21:17, the concern for Benjamin's inheritance directly follows the repentance in 21:15, both focused on preserving the tribe.