Albert Barnes Commentary Jeremiah 18:21

"Therefore deliver up their children to the famine, and give them over to the power of the sword; and let their wives become childless, and widows; and let their men be slain of death, [and] their young men smitten of the sword in battle." — Jeremiah 18:21 (ASV)

Pour out ... sword – literally, "pour them out upon the hands of the sword," i.e., give them up to the sword.

Put to death – Rather, slain by death. The prophet’s phrase leaves it entirely indefinite in what way the men are to die.