Commentary for Judges 20:42

וַיִּפְנ֞וּ לִפְנֵ֨י אִ֤ישׁ יִשְׂרָאֵל֙ אֶל־דֶּ֣רֶךְ הַמִּדְבָּ֔ר וְהַמִּלְחָמָ֖ה הִדְבִּיקָ֑תְהוּ וַאֲשֶׁר֙ מֵהֶ֣עָרִ֔ים מַשְׁחִיתִ֥ים אוֹת֖וֹ בְּתוֹכֽוֹ׃

Therefore they turned their backs before the men of Israel unto the way of the wilderness; but the battle followed hard after them; and they that came out of the city destroyed them in the midst of the men of Israel.

Rashi on Judges