וַיֹּֽאמְר֨וּ זִקְנֵ֣י הָעֵדָ֔ה מַה־נַּעֲשֶׂ֥ה לַנּוֹתָרִ֖ים לְנָשִׁ֑ים כִּֽי־נִשְׁמְדָ֥ה מִבִּנְיָמִ֖ן אִשָּֽׁה׃
Then the elders of the congregation said: ‘How shall we do for wives for them that remain, seeing the women are destroyed out of Benjamin?’
Read midrashic interpretation of Judges 21:16: and classical rabbinic exegesis.