וְנָתַתִּ֤י אוֹתָם֙ בְּיַ֣ד אֹֽיְבֵיהֶ֔ם וּבְיַ֖ד מְבַקְשֵׁ֣י נַפְשָׁ֑ם וְהָיְתָ֤ה נִבְלָתָם֙ לְמַֽאֲכָ֔ל לְע֥וֹף הַשָּׁמַ֖יִם וּלְבֶהֱמַ֥ת הָאָֽרֶץ׃
I will even give them into the hand of their enemies, and into the hand of them that seek their life; and their dead bodies shall be for food unto the fowls of the heaven, and to the beasts of the earth.
Read Jewish philosophy on Jeremiah 34:20: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.