Jeremiah 12:14

Against all mine evil neighbors - All the neighboring nations who have united in desolating Judea shall be desolated in their turn: they also are wicked, and they shall be punished. If I make them executors of my justice, it is to them no proof of my approbation. God often uses one wicked nation to scourge another; and afterwards scourges the scourger by some other scourge. In some places a felon who was condemned to be hanged is made the common hangman for the county; he himself being still under the sentence of death, -

Till soon some trusty brother of the trade

Shall do for him what he has done for others.