He shall reward evil unto mine enemies: cut them off in thy truth. He shall reward evil - Saul and his courtiers, instead of having God's approbation, shall have his curse.
Cut them off in thy truth - Thou hast promised to save me; these have purposed to destroy me. Thy truth is engaged in my defence; they will destroy me if permitted to live: to save thy truth, and to accomplish its promises, thou must cut them off.