The substance of the answer returned by the prophet to the king is this: That whereas they pleased themselves with fancies that the Babylonian army now withdrawn to meet with the army of the Egyptians would return no more to the siege, it was a dream; he assures them from God they should return, besiege the city, and take it, and burn it; and therefore they did but deceive themselves to think otherwise; though they were gone, yet it was but for a very short time. He further assures them that the potency or impotency of the Chaldeans was inconsiderable; for if their whole army were made up of wounded men, or if they could prevail so far as to wound all their soldiers, or thrust them through, (as the word is translated, Jeremiah 51:4) yet they should do the work. When God is resolved upon an effect, the instruments are very little to be regarded. It is not the arm of flesh, but the power of God, which is in that case alone to be considered.
Related Commentaries of Jeremiah 37:10
Jeremiah 37:10
10 For though ye had smitten the whole army of the Chaldeans that fight against you, and there remained but woundedc men among them, yet should they rise up every man in his tent, and burn this city with fire.