וַיֵּצֵא֩ בִנְיָמִ֨ן ׀ לִקְרָאתָ֥ם ׀ מִֽן־הַגִּבְעָה֮ בַּיּ֣וֹם הַשֵּׁנִי֒ וַיַּשְׁחִיתוּ֩ בִבְנֵ֨י יִשְׂרָאֵ֜ל ע֗וֹד שְׁמֹנַ֨ת עָשָׂ֥ר אֶ֛לֶף אִ֖ישׁ אָ֑רְצָה כָּל־אֵ֖לֶּה שֹׁ֥לְפֵי חָֽרֶב׃
And Benjamin went forth against them out of Gibeah the second day, and destroyed down to the ground of the children of Israel again eighteen thousand men; all these drew the sword.
Read midrashic interpretation of Judges 20:25: and classical rabbinic exegesis.