Charles Ellicott Commentary Jeremiah 34:20

"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 birds of the heavens, and to the beasts of the earth." — Jeremiah 34:20 (ASV)

Their dead bodies shall be for meat ... —As in Jeremiah 7:33; Jeremiah 16:4; Jeremiah 19:7, this takes its place as the most extreme penalty of transgression. The sentence on Zedekiah and his princes—that is, those who were more immediately connected with his policy—is as before (Jeremiah 34:5) somewhat milder, probably because he, though too weak and indecisive to stop the evil which the prophet condemned, had not been actively prominent in the transgression of the covenant, and showed more inclination, as in Jeremiah 37:17, to listen to his counsel.