Jeremiah
Jeremiah 51:11ESV·traditional attribution

“Sharpen the arrows! Take up the shields! The LORD has stirred up the spirit of the kings of the Medes, because his purpose concerning Babylon is to destroy it, for that is the vengeance of the LORD, the vengeance for his temple.

John Calvin Reformed @genevareformer

These words might have been addressed to the Medes as well as to the Babylonians. If the latter meaning be approved, that is, that the Prophet addresses the Babylonians, the words are a taunt, as though he had said, that they were to no purpose spending their labors in preparing their armies, because God would be stronger than they, and that the Medes would carry...

Matthew Henry Presbyterian @wholebiblehenry

The particulars of this copious prophecy are dispersed and interwoven, and the same things left and returned to so often that it could not well be divided into parts, but we must endeavor to collect them under their proper heads. Let us then observe here, I.

Commenting on Jeremiah 51:1-58

John Gill Reformed Baptist @doctorgill

Make bright the arrows,.... Which were covered with rust; scour them of it; anoint them with oil, as armour were wont to be; make them neat, clean, and bright, that they may pierce the deeper; hence we read of a "polished shaft", or arrow, one made bright and pure, Isa 49:2; agreeably to this some render the word "sharpen the arrows" (k); so the Targum.