Jeremiah 48:10 in the King James Version
Cursed be he that doeth the work of the LORD deceitfully, and cursed be he that keepeth back his sword from blood.
Context
9 Give wings to Moab, that she may fly and get herself away: and her cities will become a desolation, without anyone to dwell in them.
10 “Cursed is he who does the work of the LORD negligently; and cursed is he who keeps back his sword from blood.
11 “Moab has been at ease from his youth, and he has settled on his dregs, and has not been emptied from vessel to vessel, neither has he gone into captivity; therefore his taste remains in him, and his scent is not changed.