Jeremiah 48:10
Cursed is the one who is remiss in doing the work of the LORD, and cursed is he who withholds his sword from bloodshed.
Berean Standard Bible
Cursed be he that doeth the work of the LORD deceitfully, and cursed be he that keepeth back his sword from blood.
“Cursed is he who does the work of the LORD negligently; and cursed is he who keeps back his sword from blood.