Reference for Judges 21:6

וַיִּנָּֽחֲמוּ֙ בְּנֵ֣י יִשְׂרָאֵ֔ל אֶל־בִּנְיָמִ֖ן אָחִ֑יו וַיֹּ֣אמְר֔וּ נִגְדַּ֥ע הַיּ֛וֹם שֵׁ֥בֶט אֶחָ֖ד מִיִּשְׂרָאֵֽל׃

And the children of Israel repented them for Benjamin their brother, and said: ‘There is one tribe cut off from Israel this day.

BDB

BDB