King James Version (KJV)
Cursed {be} he that doeth the work of the LORD deceitfully, and cursed {be} he that keepeth back his sword from blood. {deceitfully: or, negligently}
Modern English
“Cursed is he who does the work of Yahweh negligently; and cursed is he who keeps back his sword from blood.
Hebrew
אָר֗וּר עֹשֶׂ֛ה מְלֶ֥אכֶת יְהוָ֖ה רְמִיָּ֑ה וְאָר֕וּר מֹנֵ֥עַ חַרְבּ֖וֹ מִדָּֽם׃
ʾarvr ʿosheh mleʾket yhvah rmiyah vʾarvr moneʿa ḥarbvo midam