וַֽיִּפְּלוּ֙ מִבִּנְיָמִ֔ן שְׁמֹנָֽה־עָשָׂ֥ר אֶ֖לֶף אִ֑ישׁ אֶת־כָּל־אֵ֖לֶּה אַנְשֵׁי־חָֽיִל׃
And there fell of Benjamin eighteen thousand men; all these were men of valour.
Read midrashic interpretation of Judges 20:44: and classical rabbinic exegesis.