Matthew Poole and continuators on Jeremiah 21:5

5 And I my self will fight against you with an out-stretched hand, and with a strong arm, even in anger, and in fury, and in great wrath .

I will fight against you, as a Prince is said to fight against a Nation, whose Captains fight against it, though himself stirreth not from his Royal Palace: yea more than so, animating and influencing the Babylonians and Chaldeans, whom I have sent to fight against you▪ and discouraging and dispiriting your Armies.

With such an hand, and power as I manifested for my ancient Israel, Exod. 6.6. God is here spoken of in a Dialect which maketh him more intelligible to us. He hath no hands, no arms, neither is anger and fury in him considered as turbulent Passions, as they are in us; but as men stretch out their hands and arms when they intend to give smart, and terrible strokes, and are edged to such blowes from their passions and excessive wrath, so God is set out to us by expressions proper to men, and in him significative onely of his just Will to be revenged severely upon a sinful people. The sense is no more, than that an end was now come, and God was resolved no longer to bear with such a provocative people, but to bring his utmost wrath upon them, and to deal with them no longer according to his wondrous works of Mercy, but in wondrous works of Justice which in men would look like the effects of Wrath and Fury.