וָֽאֹחֵ֤ז בְּפִֽילַגְשִׁי֙ וָֽאֲנַתְּחֶ֔הָ וָֽאֲשַׁלְּחֶ֔הָ בְּכָל־שְׂדֵ֖ה נַחֲלַ֣ת יִשְׂרָאֵ֑ל כִּ֥י עָשׂ֛וּ זִמָּ֥ה וּנְבָלָ֖ה בְּיִשְׂרָאֵֽל׃
And I took my concubine, and cut her in pieces, and sent her throughout all the country of the inheritance of Israel; for they have committed lewdness and wantonness in Israel
Read midrashic interpretation of Judges 20:6: and classical rabbinic exegesis.