Matthew Poole and continuators on Jeremiah 34:20

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 meat unto the fowles of the heaven, and to the beasts of the earth .

God doth not threaten all the Iews, but those onely, who had made this Covenant, and formally confirmed it, by killing a Beast, and passing through the parts of it thus divided, and laid opposite one to another. Of these he spareth none but threatens both the King and Nobles and great Courtiers, as well as the People. That he would give them into the hand of their Enemies that thirsted after their blood, they should be slain, and their dead bodies should not be buried. Herein the Righteousness of God appeared, by doing to them as they desired (by passing betwixt the Calf) that God would do in case they did not keep to the promise they had made, and called God to witness, and challenging him to destroy them if they did not fulfil what they covenanted for.

Marginal references: chap. 7.33. and 16.4.